Roadmap to 0.3.0 release

[aaronwalsman]

Necessary Issues to address:

• reuse textures (maybe make textures and cube-maps separate asset types)
• document context managers
• document core
• lighting model
• assets
• primitives
• larger scene optimization would be soooo nice
• organize executables
• organize examples/assets
• resize_image.py
• old_utilities
• clean up context managers (mostly done)
• camera

[aaronwalsman]

• Adam's Poetry
• OSX support would also be niiiiice

[aaronwalsman]

X lighting model

[aaronwalsman]

X reuse textures X document context managers X document core X assets X primitives X organize executables X organize examples/assets X resize_image.py X old utilities X clean up context managers X camera