0.10.0

Fixes #2: Support drawing large arrays of 3D objects in a single draw call
Fixes #17: Optimize normal matrix calculation
Fixes #18: Mesh mapping brightness correction is also applied to alpha component
Fixes #19: Generalize mesh mapping to allow for pixel space view mapping
Fixes #20: Allow rotation of spherical environmental mapping to allow for non-centered maps

Full Changelog: 0.9.1...0.10.0