Restructuring new menu code, plus misc cleanups.
Removing unneeded structs.
Removing non-existent doc directory from gitignore.
Clarifying which files are covered by this license.
Adding lua to link flags.
Adding font_get_width to check the width of a string before rendering.
Minor cleanups.
Pre-rendering onscreen message, and making it look a little nicer.
Filename change.
lua script defining Frost's graphics and animations
Renaming test.lua to frost.lua
Rough version of real-time video filters.
Various improvements including internal font reference and buffering/pre-rendering the menu.
Mostly disabling the mixer for now.
Targets set on-screen message when activated.