Implement macro for defining typesafe flags
Devectorize InitFlag
Devectorize WindowFlags
Devectorize RendererFlags
Devectorize SurfaceFlag
Support all bitwise operations on flags
Move u32 cast into flag_type! macro
Devectorize keyboard::Mod
Devectorize mouse::MouseState
Devectorize joystick::HatState
Support arbitrary flag widths
Use u8 for joystick::HatState
Merge pull request #85 from jcmoyer/bitwise-flags

Devectorize flags in favor of bitwise operators