[#836] Use eventIdExtractor
[#834] Allow arbitrary methods in WS API
[#653] Fixed nested less imports and error handling
WS: add file upload (not chunked)
[#474] Improved WS API charset handling
Updated SecureSocial information
Adding Pusher module references
[#474] Added tests for WS API charset handling
Merge branch 'master' of github.com:playframework/Play20 into ws-charset
Update documentation/manual/javaGuide/tutorials/zentasks/JavaGuide4.md

Method findTodoInvolving belongs to Task class
[#474] Added matching Scala behaviour for response charset handling
If no Accept header field is present, then it is assumed that the client accepts all media types. (RFC 2616)
Merge Writeable[T] and ContentTypeOf[T]
Describe the possible representations of a resource and let Play find the best according to requests Accept header value
Take quality factor into account in the Accept-Language header
Content negotiation documentation
Fix Java JSON documentation link
Updated action not found and bad request examples

Updated action not found and bad request examples. They didn't seem to work before in the current version.
Merge pull request #545 from DiogoTavaresDeAlmeidaRibeiro/patch-1

Update documentation/manual/javaGuide/tutorials/zentasks/JavaGuide4.md
Merge pull request #548 from SimonChong/patch-2

Updated action not found and bad request examples