Merge pull request #57 from skpcharles/master

Added fix for invite Students to Class in Bulk adding issue
CORE-503 - [Common Core Standard Codes] API to Display Common Core Dot Notation in product
Merge branch 'master' of https://github.com/Gooru/Gooru-Core-API
Merge pull request #58 from skpcharles/master

Added fix for Unable to create child account issue
Optimized the partner library
optimized the  folder item fetch logic
improved the optimization for folder child item fetch
CORE-519 Retrieve the content at user level based on the standards preferences
Merge pull request #60 from johnsonphilip/master

CORE-519 Retrieve the content at user level based on the standards prefe...
CORE-567
Provide support to fetch the user workspace details based on user uid
Merge branch 'master' of https://github.com/Gooru/Gooru-Core-API
Merge remote-tracking branch 'gooru/master'
More changes on Unable to switch back to original email id if child account is associated with it