Added doc files for authentication samples
Merge pull request #470 from priand/playground

Playground NSF precompiled
Fixes for defect 82462 : Additional secuirty cookies cause OAuth based
request to fail
Oauth related changes
Merge pull request #472 from ManishKataria/OAuthFixes_Cookies

O auth fixes cookies
Merge pull request #471 from RajmeetBal/docFilesForAuthenticationSamples

Added doc files for authentication samples
Made the OAuthEndpoint default ctor public else it cannot be
instantiated as a bean