- Added GFX capability independentMrtBitDept.
Merge pull request #17 from rextimmy/deferred_shading

- Added GFX capability independentMrtBitDept.
 - Fixed spelling error on independentMrtBitDepth

 - Made default value false for "independentMrtBitDepth" when checking in renderPrePassMgr
Merge pull request #18 from rextimmy/deferred_shading

Fixed spelling error on independentMrtBitDepth