We use SDL2_ttf
Rename COPYING.txt to GPL-2.0.txt
Add dependency licenses
Describe licensing in LICENSE.txt
Merge pull request #59 from parasti/legal

Sort out licensing information
Update README

Also attempt to convert to Markdown.
README: fix local links
Fix typo
Move GPLv2 to doc/legal/ as well
Add Markdown files to .gitattributes
Clean up joystick axis naming
Add reshauns easyputt course
Revert to directional lights
Add Reshaun to authors.txt
Add reshaun`s diagonal ball and updates to authors.txt
Remove eyeball ball ... ball ... ball
Revert "Remove eyeball ball ... ball ... ball"

This reverts commit 02bbf3b12444b60c3999fa550eff6366be7d0dec.
New eyeball
Add new Blinky texture and credit the artist
Add --data option to mapc

Allowing only one explicit data directory meant that out-of-tree SOLs
could not use their own materials while simultaneously using the stock
Neverball materials. This allows an arbitrary number of extra
directories.