Merge remote-tracking branch 'upstream/release-6.2' into release-6.2

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Implemented create star ratings for the resources.
Merge branch 'release-6.2' of https://github.com/Gooru/Gooru-Web into release-6.2

Conflicts:

src/main/java/org/ednovo/gooru/client/mvp/play/resource/body/ResourcePlayerMetadataUiHandlers.java

src/main/java/org/ednovo/gooru/client/mvp/play/resource/body/ResourcePlayerMetadataView.java

src/main/java/org/ednovo/gooru/client/mvp/shelf/collection/Collection.css

src/main/java/org/ednovo/gooru/client/mvp/shelf/collection/CollectionCBundle.java

src/main/java/org/ednovo/gooru/client/mvp/shelf/collection/tab/info/CollectionInfoTabView.java

src/main/java/org/ednovo/gooru/client/mvp/shelf/collection/tab/info/CollectionInfoTabView.ui.xml

src/main/java/org/ednovo/gooru/shared/util/MessageProperties.java
Merge pull request #27 from VinRudramurthy/release-6.1.5

Created user ratings, functionality.