Merge pull request #89 from skpcharles/master

Added fix for collection update issue
Merge pull request #90 from skpcharles/master

Added fix for create colletion issue
Fixed NPE
CORE-705 Added from display name for email send from gooru
core 705 add from address instead from display name
Merge pull request #91 from vksvenkat/master

CORE-705 Added from display name for email send from gooru
Added fix for 'Invite Students' Emails are not sending