Took out anaglyph functionality. The setting remains -- I'll get rid of if in the next commit.
Overhauled GameSettings. Settings file's string literals are now case-insensitive. Use Settings enum instead of integer literals to work with settings.
Updated Options and AdvancedOptions screens -- some settings have been rearranged.
Removed anaglyph setting and leftover code.
Merge pull request #213 from fragmer/master

GameSettings and Options GUI overhaul.