WIP: CFD-134 - Changing group permission

#156 
WIP
![selection_382](https://cloud.githubusercontent.com/assets/99186/4842556/cf25e086-6026-11e4-8afd-607ed72781f7.png)

@shushu also, since you are already there -- can you remove all the non-related functions from ``FeatureContext.php`` -- it seems they were copy/ pasted from another project.