Merge pull request #51 from doodaddy64/development

Development
Fix OSX-Debug rapidjson header include
Merge pull request #59 from pchan126/bugfix/rapidjson

Fix OSX-Debug rapidjson header include
Merge remote-tracking branch 'refs/remotes/whilke/feature/guiGrid' into development.
- Updated the formatting for the guiGridCtrl source to coincide with the coding standard used in other parts of the engine.
- Added guiGridCtrl source to Xcode projects