Navigator v0.4.8

-Added controller support
-New mouse cursor input option
-Added brakes and rotation in place
-Added support for levels with multiple obstacle types
-Added a new ship type
-Added heat seeking lasers
-Reworked boost animation
-Now uses vectors for accurate diagonal movement
-New cython version for Intel based Macs

Full Changelog: v0.4.7...v0.4.8