Merged texture-min-filter and texture-mag-filter into texture-filter.
Merge branch 'feature/learningwebgl' of github.com:Asakeron/cljs-webgl into feature/learningwebgl
Most options are parameterized in create-texture.
Moved load-image and load-texture to learningwebgl.common.
Parameterized texture-unit in set-texture in cljs-webgl.buffers.
Updated examples to match new texture API.