To get developer builds, see HammerLib wiki.

Changes:

• 12.2.59 - Fix VariableShaderProgram's uniform cache being populated incorrectly and make default float values in the cache NaN, so regardless of what the first setUniform call will have - it will always go through.
• 12.2.59 - Cleanup a lot of unused things, optimize VariableShaderProgram by using hash maps instead of dumb array maps, as well as reuse previous shader states for int1/float1 uniforms, reducing amount of GL calls when the data is the same.