add the CreateTeacherMixin
in the browser: fix the selecting of the facility when logging in
disable facility deletion UI for teachers
Disable "Delete Group" button for teachers
disable coach deletion button for teachers
load i18n exercises into the app's static dir
Merge pull request #2171 from aronasorman/2165

load i18n exercises into the app's static dir
fix the start of downloading of language packs
Merge pull request #2166 from aronasorman/2158

Disable some deletion features for teachers
Skeleton for exam coach report
Rendering table correctly.
Inheriting navigation between facilities and groups correctly
Table rendering complete with summary stats (max, min, etc)
Test detail page is functional
A tiny refactor and style tweaks.
'Overall' stat working
Woohoo total functionality!
Make test options available to switch between
Simple coach report test
Styled coach report landing page to accomodate test button