Merge remote-tracking branch 'gooru/master'
Fixed message properties
Merge branch 'master' of https://github.com/cyrilraja/Gooru-Core-API
Merge pull request #540 from skpcharles/master

Added fix for empty folder shows up after moving public collecion out
Merge pull request #541 from cyrilraja/master

Fixed message properties
Fixed null pointer exception
Merge remote-tracking branch 'gooru/master'
Fixed null pointer exception
Merge pull request #542 from sheebans/master

Fixed null pointer exception
fixed null pointer issue in assign collection to a class API