Added group related twitter feeds
Renamed parameters for twitter API, switch to enable/disable twitter feeds
Added group check
Removed unneeded stuff
Added check to see if hastag is given
Moved style declarations to CSS file
Cleaned code
Refactored to smaller functions
Added docblock
Removed duplicate group check
Removed dependancy injection of container to TwitterService
Merge pull request #122 from CoBase/group-specific-tweets

Group specific tweets