Changes for UI on the top navigation bar and My classes Home page.
Merge pull request #614 from VinRudramurthy/dev-branch

Added alert pop-up to check blocked user while logging in through gmail.
share and flag a content events are implemented.
ClasspageServiceImpl.java file conficts has been resolved.
Merge pull request #616 from shivalinga/dev-branch

share and flag a content events are implemented.
Updated css changes for classpage home page.
Merge pull request #618 from ssushma/dev-branch

Changes for classpage home page implemented.
Message properties conflits resolved
Merge pull request #619 from ssushma/dev-branch

Message properties conflits resolved
Fixed null pointer exception.
Merge pull request #621 from anilgooru/dev-branch

Fixed null pointer exception.
Changes for the drop menu new sort option implemented in Teach mode.
Merge pull request #622 from ssushma/dev-branch

Changes for the drop menu new sort option implemented in Teach mode.
New UI Changes for No Assignments page Implemented.
Merge pull request #624 from ssushma/dev-branch

New UI Changes for No Assignments page Implemented.
Header seperation div added and drop menu changes implemented
Removed unnecessary messaging
Merge pull request #626 from ssushma/dev-branch

Creating class not working issue resolved
Opacity issue resolved for classpage Home page
Merge pull request #628 from ssushma/dev-branch

Opacity issue resolved for classpage Home page