support half-float as an image source texture type
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
Refactoring Batch to always use a VboMesh internally
Adding AttributeMapping to Batch(geom::Source) constructor
Minor removing stray semicolon
Un-virtualizing enable() and disable() on GeomIo
Making VboMesh::Layout interleave by default; minor updates
VboMeshes (and Batches) are interleaved vertex data by default
Updating copyData() to support 1D, and VertexNormalLines declares enabled attribs
Refactor to allow additional attributes to be requested on Source::loadInto() to allow GLSL to drive attribute requests
Continuing with requiredAttribs in Source::loadInto()
Refactoring geom getAvailableAttribs(); pull methodology for geom::Source