Completed: Grade/Make/Review -Test

Still need some css fixes and some bugg tracking.
Merge pull request #49 from zanax/master

Completed: Grade/Make/Review -Test
admin func
Merge pull request #50 from NielsMasdorp/master

admin func
Text chat werkt.
Merge branch 'master' of https://github.com/kerrermanisNL/PDL
Merge Gijs, chapter works
admin afronding
Merge pull request #52 from NielsMasdorp/master

admin afronding
merge gijs
Chapters @adminPanel,Back buttons (for admins/teachers/students) and probably more