added support to update the content last modification
Revert "added support to update the content last modification"

This reverts commit 8daf8e3975fbcc31bc934479871906d91a0707c3.
Merge remote-tracking branch 'gooru/master'
Added filter support  for library standards based on root node ID
Change cache key for fetch collection library data
Merge pull request #96 from sheebans/master

changed cache key for fetch library collection