Merge remote-tracking branch 'origin/master' into zhihao
Merge pull request #27 from dolob-mrmr/hamzah

Hamzah
Merge remote-tracking branch 'origin/master' into zhihao
added Class Diagram
Merge remote-tracking branch 'origin/master' into hamzah
Merge pull request #28 from dolob-mrmr/zhihao

Zhihao
Merge remote-tracking branch 'origin/master' into hamzah
Added generalised version of Use Case Diagram, which is in the second tab