Merge pull request #448 from priand/playground

Fixed the preview servlet when the session has expired
Merge pull request #449 from priand/playground

Playground
Made some methods public
Merge pull request #450 from priand/SDK

Made some methods public
New sample which demonstrates how to start a forum and display the
outcome
Merge pull request #451 from markewallace/StartAForumSample

New sample which demonstrates how to start a forum and display the outcome
update profile pic sample
Merge pull request #452 from swatisingh10/ProfilePicSample_3rdSep

update profile pic sample
Fixed the custom environment in the Playground