* Renamed Type enum to Target to be consistent with OpenGL naming
* Strongly typed enums
* Ability to specify different type when binding/setting data
* Added missing buffer targets
* Removed VertexPointer typedef, as size_t is somewhere 64bit and
OpenGL doesn't have corresponding data type. Using unsigned int
everywhere instead, to avoid confusion.
* Removed Face structure altogether, using vertex indices directly.
* Greatly reduced size of unit tests, also thanks to C++11
std::initializer_list feature.