Adding IOS support.
Adding Game Center support for IOS and OSX
Merge pull request #1228 from dducharme/next

Adding Game Center support for IOS and OSX
The GameCenterSocial files.
Merge pull request #1229 from dducharme/next

The GameCenterSocial files.
Fixed spelling mistakes in comments.
Updated .gitignore to ignore tools Debug and Release directories.
Updated samples and template for GameKit deps
Merge pull request #1230 from dgough/next

Fixed spelling mistakes.
Bug fix where Camera::_listeners isn't set to NULL on creation of an Orthographic camera.
Fixing the macosx projects.
Merge pull request #1232 from dducharme/next

Fixing the macosx projects.
Merge pull request #1233 from seanpaultaylor/next

Updated samples and template for GameKit deps
Merge pull request #1231 from rcmaniac25/fix-orth-camera

Fix Orthographic camera not initializing the listeners on creation