Merge pull request #52 from Livefyre/dev

Deletes of nested replies now propagated upwards
Merge pull request #53 from Livefyre/dev

Thread safety fix
Merge pull request #54 from Livefyre/dev

Scroll viewport to appropriate position when replying or posting
Merge branch 'master' of github.com:Livefyre/StreamHub-iOS-Example-App into dev