Finish GetCommitmentController + GetCommitmentRequestObserver + CommitmentsModel

Signed-off-by: Hui Zheng <hzheng@wpi.edu>
Add Files

Signed-off-by: Hui Zheng <hzheng@wpi.edu>
Merge branch 'LETUSMERGE' of github.com:Tommzy/wpi-suite into LETUSMERGE