Added new event handlers to navigate to next assignments.
integration events for display next assignments.
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

* upstream/dev-branch:
  Nutan widget changes reverted
  "For standards not chosen in standards preferences, disable in standards browse Implemented."
  conflicts has been resolved.
  Resolved compilation issue.
  implemented analytics data in assignment view.
  assignment widget reveal place issue resolved
  Displaying unitDetails when user navigate from add assignments
  Reordering assignment with in the unit issue rectified.
  partially implemented displaying collection summary data.
Reverted : Changed the session from FS to CS.
Fixed issue with showing personalise screen and display next set of assignments on pagination.
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

* upstream/dev-branch:
  css style has been added for reaction hypon
  Issue rectified with right and left arrow while reorder in unit details page.
  "player analytics old version integration"
  "Unit goals update event handled and validations added."

Conflicts:
	src/main/java/org/ednovo/gooru/client/mvp/classpages/unitdetails/UnitAssignmentView.java
Merge pull request #1843 from anilgooru/dev-branch

Fixed following..