Matrix: Add assignment operator
Matrix: Add copy constructor
Matrix: Add operators * and *=
Matrix: Add Translate method
Cleaning up matrix test
Crowd: Protected constructor
Crowd: Add Create factory method
Crowd: Implement Bind/Unbind methods
Crowd: Add buffer handle
Node: No longer Drawable, only Bindable
Crowd: Basic Create implementation
Crowd: Add NumMembers var
Crowd: Set buffer data in Create method
ShaderProgram: Renaming library variables
Matrix: Rename static Scale method to ScaleMatrix
Matrix: Static Translation->TranslationMatrix
Matrix: Add Scale method
Matrix: Add Invert(ed) and Determinant methods
Crowd: No longer copy data when generating buffer
Crowd: Rename NumMembers->Population