Write Test cases for our basic WebGL classes

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This is intended to be a <20min task. Just add a few test cases that construct our basic classes in the src/webgl directory and call a method or two. context funcs, Program, Buffer, Texture classes.

This will validate the electron integration #61

I am thinking we should have a structure with a -spec.js file matching each source file.

• test/webgl/buffer-spec.js
• test/webgl/program-spec.js
• test/webgl/buffer-spec.js
• test/webgl/index.js

[ibgreen]

A number of these are in place now.