Update create challenge test to use the create challenge button
Hide create challenge button from non supervisors
Merge branch 'createchallenge' of https://github.com/boersmamarcel/challengesplatform into createchallenge
Merge pull request #205 from boersmamarcel/createchallenge

fixed bug and modified test to include button
Create Markdown and Santize Function wrapper
Merge pull request #206 from boersmamarcel/createchallenge

Create Markdown and Santize Function wrapper
Merge master into branch