Removed unused codes and improved variable names
Merge remote-tracking branch 'gooru/master'
Resolved conflicts
Removed unwanted final from variables
*refactored variable name in classpage
Merge remote-tracking branch 'gooru/master'
Merge branch 'master' of https://github.com/cyrilraja/Gooru-Core-API
Merge pull request #457 from cyrilraja/master

*refactored variable names in classpage
Merge remote-tracking branch 'gooru/master'
added constants for Controllers
*Configured CORS PUT,DELETE
Merge branch 'master' of https://github.com/cyrilraja/Gooru-Core-API
Merge pull request #458 from cyrilraja/master

*Configured CORS PUT,DELETE
Added support for save re-index requests
Core-1464 Need an Gooru API to retrieve default gooru version
Merge pull request #459 from PurnimaGS/master

Core-1464 Added Gooru API to retrieve  gooru version
Merge pull request #456 from saravanab/master

Added Delete support for ContentProviderAssoc
Removed unused codes and improved variables
Improvement on index queue support
Improved multiversion logic