Merge branch 'develop'

README.md

app/apps/core/static/js/edit.js

app/apps/core/static/js/panels/binarization.js

app/apps/core/static/js/panels/segmentation.js

app/apps/core/static/js/panels/source.js

app/apps/core/static/js/panels/transcription.js

app/apps/imports/mocks/test.alto

app/apps/users/tests.py

app/escriptorium/static/css/escriptorium.css

app/escriptorium/static/js/wheelzoom.js

app/escriptorium/templates/core/document_images.html

app/escriptorium/templates/core/document_part_edit.html

app/escriptorium/templates/core/wizards/import.html

app/escriptorium/utils.py