Create license-octocat.md

Confirmed wording with GitHub on 14th April 2014 via email.
Update LICENSE.md to reference license-octocat.md
Fix Putt leaking beam color to GUI
Fix sun.png's clipped edges.
Merge pull request #74 from Cheeseness/sun-clip-fix

Fix sun.png's clipped edges.
Add cheese-ball.
Fix occurrences of NOFACE billboards

See commit 79f1fc9a654763931ebfb8798d90615a44775ea7.
Use general alpha-test functionality for ball tests

This removes the ball-specific alpha-test system in favor of the newer
material-based capabilities, thereby also eliminating the possibility
of conflicts between the two systems.
Merge pull request #75 from Cheeseness/cheese-ball

Add cheese-ball.
Merge pull request #76 from fwp/ball-alpha

Use general alpha-test functionality for ball tests
Reset Putt's "go to hole" input if the hole failed to load
Count milliseconds per SOL instead of in a global
Pass command handler as a parameter to SOL functions

This removes another piece of global state. This looks really, really
ugly at the moment, but does point the code in the right direction.
Process entity motion in ball SOLs
Port item animations to entity-based animation