Add of fontawesome

Glyphicon has been deprecated in the Bootstrap 4. The natural
replacement is fontawesome that I added in the template system and
updated some of the main links.
Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/static/fonts/fontawesome/LICENSE.txt

+Font Awesome Free License
+-------------------------
+
+Font Awesome Free is free, open source, and GPL friendly. You can use it for
+commercial projects, open source projects, or really almost whatever you want.
+Full Font Awesome Free license: https://fontawesome.com/license.
+
+# Icons: CC BY 4.0 License (https://creativecommons.org/licenses/by/4.0/)
+In the Font Awesome Free download, the CC BY 4.0 license applies to all icons
+packaged as SVG and JS file types.
+
+# Fonts: SIL OFL 1.1 License (https://scripts.sil.org/OFL)
+In the Font Awesome Free download, the SIL OLF license applies to all icons
+packaged as web and desktop font files.
+
+# Code: MIT License (https://opensource.org/licenses/MIT)
+In the Font Awesome Free download, the MIT license applies to all non-font and
+non-icon files.
+
+# Attribution
+Attribution is required by MIT, SIL OLF, and CC BY licenses. Downloaded Font
+Awesome Free files already contain embedded comments with sufficient
+attribution, so you shouldn't need to do anything additional when using these
+files normally.
+
+We've kept attribution comments terse, so we ask that you do not actively work
+to remove them from files, especially code. They're a great way for folks to 
+learn about Font Awesome.
+
+# Brand Icons
+All brand icons are trademarks of their respective owners. The use of these
+trademarks does not indicate endorsement of the trademark holder by Font
+Awesome, nor vice versa. **Please do not use brand logos for any purpose except
+to represent the company, product, or service to which they refer.**

django/static/fonts/fontawesome/README.md

+# Font Awesome 5.0.8
+
+Thanks for downloading Font Awesome! We're so excited you're here.
+
+Our documentation is available online. Just head here:
+
+https://fontawesome.com

django/static/fonts/fontawesome/advanced-options/metadata/categories.yml

+accessibility:
+  icons:
+    - accessible-icon
+    - american-sign-language-interpreting
+    - assistive-listening-systems
+    - audio-description
+    - blind
+    - braille
+    - closed-captioning
+    - deaf
+    - low-vision
+    - phone-volume
+    - question-circle
+    - sign-language
+    - tty
+    - universal-access
+    - wheelchair
+  label: Accessibility
+arrows:
+  icons:
+    - angle-double-down
+    - angle-double-left
+    - angle-double-right
+    - angle-double-up
+    - angle-down
+    - angle-left
+    - angle-right
+    - angle-up
+    - arrow-alt-circle-down
+    - arrow-alt-circle-left
+    - arrow-alt-circle-right
+    - arrow-alt-circle-up
+    - arrow-circle-down
+    - arrow-circle-left
+    - arrow-circle-right
+    - arrow-circle-up
+    - arrow-down
+    - arrow-left
+    - arrow-right
+    - arrow-up
+    - arrows-alt
+    - arrows-alt-h
+    - arrows-alt-v
+    - caret-down
+    - caret-left
+    - caret-right
+    - caret-square-down
+    - caret-square-left
+    - caret-square-right
+    - caret-square-up
+    - caret-up
+    - cart-arrow-down
+    - chart-line
+    - chevron-circle-down
+    - chevron-circle-left
+    - chevron-circle-right
+    - chevron-circle-up
+    - chevron-down
+    - chevron-left
+    - chevron-right
+    - chevron-up
+    - cloud-download-alt
+    - cloud-upload-alt
+    - download
+    - exchange-alt
+    - expand-arrows-alt
+    - external-link-alt
+    - external-link-square-alt
+    - hand-point-down
+    - hand-point-left
+    - hand-point-right
+    - hand-point-up
+    - hand-pointer
+    - history
+    - level-down-alt
+    - level-up-alt
+    - location-arrow
+    - long-arrow-alt-down
+    - long-arrow-alt-left
+    - long-arrow-alt-right
+    - long-arrow-alt-up
+    - mouse-pointer
+    - play
+    - random
+    - recycle
+    - redo
+    - redo-alt
+    - reply
+    - reply-all
+    - retweet
+    - share
+    - share-square
+    - sign-in-alt
+    - sign-out-alt
+    - sort
+    - sort-alpha-down
+    - sort-alpha-up
+    - sort-amount-down
+    - sort-amount-up
+    - sort-down
+    - sort-numeric-down
+    - sort-numeric-up
+    - sort-up
+    - sync
+    - sync-alt
+    - text-height
+    - text-width
+    - undo
+    - undo-alt
+    - upload
+  label: Arrows
+audio-video:
+  icons:
+    - audio-description
+    - backward
+    - circle
+    - closed-captioning
+    - compress
+    - eject
+    - expand
+    - expand-arrows-alt
+    - fast-backward
+    - fast-forward
+    - file-audio
+    - file-video
+    - film
+    - forward
+    - headphones
+    - microphone
+    - microphone-slash
+    - music
+    - pause
+    - pause-circle
+    - phone-volume
+    - play
+    - play-circle
+    - podcast
+    - random
+    - redo
+    - redo-alt
+    - rss
+    - rss-square
+    - step-backward
+    - step-forward
+    - stop
+    - stop-circle
+    - sync
+    - sync-alt
+    - undo
+    - undo-alt
+    - video
+    - volume-up
+    - volume-off
+    - volume-down
+    - youtube
+  label: Audio & Video
+business:
+  icons:
+    - address-book
+    - address-card
+    - archive
+    - balance-scale
+    - birthday-cake
+    - book
+    - building
+    - bullseye
+    - bullhorn
+    - briefcase
+    - calculator
+    - calendar
+    - calendar-alt
+    - certificate
+    - chart-area
+    - chart-bar
+    - chart-line
+    - chart-pie
+    - clipboard
+    - coffee
+    - columns
+    - compass
+    - copy
+    - copyright
+    - cut
+    - edit
+    - envelope
+    - envelope-open
+    - envelope-square
+    - eraser
+    - fax
+    - file
+    - file-alt
+    - folder
+    - folder-open
+    - globe
+    - industry
+    - paperclip
+    - paste
+    - pen-square
+    - pencil-alt
+    - percent
+    - phone
+    - phone-square
+    - phone-volume
+    - registered
+    - save
+    - sitemap
+    - sticky-note
+    - suitcase
+    - table
+    - tag
+    - tags
+    - tasks
+    - thumbtack
+    - trademark
+  label: Business
+chess:
+  icons:
+    - chess
+    - chess-king
+    - chess-queen
+    - chess-bishop
+    - chess-knight
+    - chess-rook
+    - chess-pawn
+    - chess-board
+    - square-full
+  label: Chess
+code:
+  icons:
+    - archive
+    - barcode
+    - bath
+    - bug
+    - code
+    - code-branch
+    - coffee
+    - file
+    - file-alt
+    - file-code
+    - fire-extinguisher
+    - folder
+    - folder-open
+    - filter
+    - keyboard
+    - microchip
+    - qrcode
+    - shield-alt
+    - sitemap
+    - terminal
+    - user-secret
+    - window-close
+    - window-maximize
+    - window-minimize
+    - window-restore
+  label: Code
+communication:
+  icons:
+    - address-book
+    - address-card
+    - american-sign-language-interpreting
+    - assistive-listening-systems
+    - at
+    - bell
+    - bell-slash
+    - bluetooth
+    - bluetooth-b
+    - bullhorn
+    - comment
+    - comment-alt
+    - comments
+    - envelope
+    - envelope-open
+    - envelope-square
+    - fax
+    - inbox
+    - language
+    - microphone
+    - microphone-slash
+    - mobile
+    - mobile-alt
+    - paper-plane
+    - phone
+    - phone-square
+    - phone-volume
+    - rss
+    - rss-square
+    - tty
+    - wifi
+  label: Communication
+computers:
+  icons:
+    - desktop
+    - download
+    - headphones
+    - hdd
+    - keyboard
+    - laptop
+    - microchip
+    - mobile
+    - mobile-alt
+    - plug
+    - power-off
+    - print
+    - save
+    - server
+    - tablet
+    - tablet-alt
+    - tv
+    - upload
+  label: Computers
+currency:
+  icons:
+    - btc
+    - bitcoin
+    - dollar-sign
+    - euro-sign
+    - gg
+    - gg-circle
+    - lira-sign
+    - money-bill-alt
+    - pound-sign
+    - ruble-sign
+    - rupee-sign
+    - shekel-sign
+    - won-sign
+    - yen-sign
+  label: Currency
+date-time:
+  icons:
+    - bell
+    - bell-slash
+    - calendar
+    - calendar-alt
+    - calendar-check
+    - calendar-minus
+    - calendar-plus
+    - calendar-times
+    - clock
+    - hourglass
+    - hourglass-end
+    - hourglass-half
+    - hourglass-start
+    - stopwatch
+  label: Date & Time
+design:
+  icons:
+    - adjust
+    - clone
+    - copy
+    - crop
+    - crosshairs
+    - cut
+    - edit
+    - eraser
+    - eye
+    - eye-dropper
+    - eye-slash
+    - object-group
+    - object-ungroup
+    - paint-brush
+    - paste
+    - pencil-alt
+    - save
+    - tint
+  label: Design
+editors:
+  icons:
+    - align-center
+    - align-justify
+    - align-left
+    - align-right
+    - bold
+    - clipboard
+    - clone
+    - columns
+    - copy
+    - cut
+    - edit
+    - eraser
+    - file
+    - file-alt
+    - font
+    - heading
+    - i-cursor
+    - indent
+    - italic
+    - link
+    - list
+    - list-alt
+    - list-ol
+    - list-ul
+    - outdent
+    - paper-plane
+    - paperclip
+    - paragraph
+    - paste
+    - pencil-alt
+    - print
+    - quote-left
+    - quote-right
+    - redo
+    - redo-alt
+    - reply
+    - reply-all
+    - share
+    - strikethrough
+    - subscript
+    - superscript
+    - sync
+    - sync-alt
+    - table
+    - tasks
+    - text-height
+    - text-width
+    - th
+    - th-large
+    - th-list
+    - trash
+    - trash-alt
+    - underline
+    - undo
+    - undo-alt
+    - unlink
+  label: Editors
+files:
+  icons:
+    - archive
+    - clone
+    - copy
+    - cut
+    - file
+    - file-alt
+    - file-archive
+    - file-audio
+    - file-code
+    - file-excel
+    - file-image
+    - file-pdf
+    - file-powerpoint
+    - file-video
+    - file-word
+    - folder
+    - folder-open
+    - paste
+    - save
+    - sticky-note
+  label: Files
+gender:
+  icons:
+    - genderless
+    - mars
+    - mars-double
+    - mars-stroke
+    - mars-stroke-h
+    - mars-stroke-v
+    - mercury
+    - neuter
+    - transgender
+    - transgender-alt
+    - venus
+    - venus-double
+    - venus-mars
+  label: Genders
+hands:
+  icons:
+    - hand-lizard
+    - hand-paper
+    - hand-peace
+    - hand-point-down
+    - hand-point-left
+    - hand-point-right
+    - hand-point-up
+    - hand-pointer
+    - hand-rock
+    - hand-scissors
+    - hand-spock
+    - handshake
+    - thumbs-down
+    - thumbs-up
+  label: Hands
+health:
+  icons:
+    - accessible-icon
+    - ambulance
+    - h-square
+    - heart
+    - heartbeat
+    - hospital
+    - medkit
+    - plus-square
+    - stethoscope
+    - user-md
+    - wheelchair
+  label: Health
+images:
+  icons:
+    - adjust
+    - bolt
+    - camera
+    - camera-retro
+    - clone
+    - compress
+    - eye
+    - eye-dropper
+    - eye-slash
+    - expand
+    - file-image
+    - film
+    - id-badge
+    - id-card
+    - image
+    - images
+    - sliders-h
+    - tint
+  label: Images
+interfaces:
+  icons:
+    - ban
+    - barcode
+    - bars
+    - beer
+    - bell
+    - bell-slash
+    - bug
+    - bullhorn
+    - bullseye
+    - calculator
+    - calendar
+    - calendar-alt
+    - calendar-check
+    - calendar-minus
+    - calendar-plus
+    - calendar-times
+    - certificate
+    - check
+    - check-circle
+    - check-square
+    - circle
+    - clipboard
+    - clone
+    - cloud
+    - cloud-download-alt
+    - cloud-upload-alt
+    - coffee
+    - cog
+    - cogs
+    - copy
+    - cut
+    - database
+    - dot-circle
+    - download
+    - edit
+    - ellipsis-h