Fix endless loop bug in paxed2 putt hole repulsed.map
Fix hard/medium coin values in tones set.
Remove orange_smooth.obj

As per discussion with @Cheeseness.
Closes #68.
Remove billboard flag 4 (additive blending)

All it does is set a material flag that overrides the material file,
causing confusion when somebody tries to add/remove the additive flag
from the material file.

Due to a flag being removed, B_NOFACE, which was 8, became 4. Normally I
would worry about binary compatibility and keep it an 8, but chances are
that both these flags have never been used outside of the official map
files.
Implement a config option for GUI theme selection

This patch also adjusts the directory layout to allow multiple themes to
coexist and removes support for "scale" directive in theme descriptions.
Merge pull request #70 from parasti/multiple-themes

Implement a config option for GUI theme selection
Merge pull request #69 from parasti/remove-additive-bill

Remove billboard flag 4 (additive blending)
Rename LICENSE.txt to LICENSE.md

It was already using Markdown syntax, just never properly named.
Fix broken link
Modify color of transparent areas in several textures

See commit 662371e6b5eba4f80479723b47309cb22130248e.
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.
Fix occurrences of NOFACE billboards

See commit 79f1fc9a654763931ebfb8798d90615a44775ea7.