support half-float as an image source texture type
Reallocate renderbuffer before checking if its dimensions have changed. Fixes #549
Avoid reallocating the renderbuffer if the layer dimensions have not changed
Avoid touching GL at all if a buffer resize isn't required
Attempt to replace all icon files with a single file in samples/data.
It is possible I missed a sample or test application here or there, but I did my best to catch them all.
Merge branch 'fix-ios-renderbuffer' of github.com:notlion/Cinder into notlion-fix-ios-renderbuffer
Merge branch 'notlion-fix-ios-renderbuffer' into glNext
Merge branch 'glNext' of github.com:cinder/Cinder into glNext
Merge pull request #531 from pizthewiz/half-float

support half-float as an image source texture type
Implement FboCubeMap::Format::textureCubeMapFormat
Fixing MipMap sample after removing Texture2d::getNumMipLevels()
Merge pull request #555 from richardeakin/glNext_texture_cubemap_fmt

Implement FboCubeMap::Format::textureCubeMapFormat
initial Param support for Pan2dNode.
implement sample accurate panning
better test code for Pan2dNode::setStereoInputModeEnabled()
fix reversed panning positions in FallingGears sample
Merge branch 'pan2d_param' into glNext

Conflicts:
	src/cinder/gl/Texture.cpp