Added some login to PreviewCurrentAuthenticationResolvingProcessor.
* Renamed default name of error message model attribute in RestScriptsController.
* Added <context:annotation-config> to main-rendering-context.xml.
* Upgraded groovy to 2.3.7.
Fix for preview authentication.
Committed change that breaked overlay in 2.4.x.
Merge pull request #38 from avasquez614/master

Several fixes