Add a batch of new samples

[espes]

-Audio3D sample (http://create.msdn.com/en-US/education/catalog/sample/3d_audio) -BloomSample (http://create.msdn.com/en-US/education/catalog/sample/bloom) -ShadowMapping (http://create.msdn.com/en-US/education/catalog/sample/shadow_mapping_1) -ShatterEffectSample (http://create.msdn.com/en-US/education/catalog/sample/shatter) -FarseerPhysicsEngine engine and sample app

-And some minor fixes to builds on Linux+Mac