Implemented if resource is flagged or not able to load, then show messaging and next resource
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Added new Messages in Messageproperties file
Merge pull request #1964 from mitraj/release-6.6.3.a1

Implemented if resource is flagged or not able to load, then show message and able to go next resource.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1