v0.5

This is the first release of meshoptimizer library. Features:

• Algorithms to index or reindex meshes and optimize them for vertex cache, vertex fetch and overdraw
• Quantization helper functions to convert vertex attributes to GPU-friendly formats
• Algorithms that analyze efficiency of given meshes for vertex cache/fetch/overdraw
• C++ interface with support for 16-bit/32-bit indices

All algorithms have been optimized for both runtime performance (it's actually practical to run them at load time!) and efficiency of the resulting meshes.