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Monthly Merge!
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Merge pull request #7 from mono/develop

September update
Removed what looked like an unnecessary effort to write a fake file just to get details on what we already had.

Also fixed sound clicking due to including the header in the sound data buffer
Merge pull request #8 from mono/develop

Pre-LD Update
A quick fix to only fire back button events on Windows Phone if they weren't handled/fired yet
Disable extra pivot nodes added by Assimp.
Improved material support.
Materials were not being assigned to the geometry.
Missed adding helper.
We skip adding nodes associated to meshes.
Added skeletion for MeshHelper static class.
Added MeshHelper.CalculateTangentFrames().
Added MeshHelper.FindSkeleton().
Added MeshHelper.SwapWindingOrder().
We now try to build a full path for assembly references.
We now dump the inner exception when content fails to build.
Added NormalizedShort4 and NormalizedShort2 to test suite.
Fixed bugs in NormalizedShort2/4 causing incompatibility with XNA.