Merge branch 'develop' into 'test/add-api-tests'

.gitignore

.gitlab-ci.yml

AUTHORS.md

README.md

client/components/Hero.jsx

client/views/Exam.css

client/views/Exam.jsx

client/views/ExamEditor.jsx

client/views/Grade.jsx

client/views/grade/EditPanel.jsx

client/views/grade/Grade.css

package.json

requirements-dev.txt

tests/data/checkboxes/scanned_page.jpg

tests/data/cornermarkers/a4-3-markers.png

tests/data/cornermarkers/a4-rotated-3-markers.png

tests/data/cornermarkers/a4-rotated.png

tests/data/flattened-a4-2pages.pdf

tests/data/scanned_pdfs/blank.jpg

tests/data/scanned_pdfs/jamy1.jpg