English version of homepage and editor's page

custom/epoc-theme/copyright.en.html

custom/epoc-theme/editeur.en.html

custom/epoc-theme/footer.en.html

custom/epoc-theme/home.en.html

custom/epoc-theme/nav.html

custom/epoc-theme/newsletter.en.html

custom/main.en.html

docs/editor.en.md

docs/index.en.md

docs/js/scripts.js