initial version of course material
Merge branch 'master' into course_material
fixed all pep8 and pyflakes errors and put pep8 and flakes check in CI
depend less on CI commands and local configurations for running tests
update and put pytest first before plugins
silence most messages.
loading youtube iframe_api synchronously Fixes #92
pep and tyne fix
tyne fix
initial version of user profile
missing template
reconfigure rest-framework;
enable admin to save lessons
Merge branch 'master' into activity-admin

Conflicts:
	lesson/serializers.py
dropzone layout
layout profile
add save button for lessons in course admin page
Merge remote-tracking branch 'origin/master' into activity-admin
transleted to pt_br
allow edit a simple question in course admin page
Merge remote-tracking branch 'origin/master' into activity-admin