Explain GitHub Pages change

Always push to both `master` and `gh-pages` branches.
Initial commit of shader test.

- New vertexShader.
- New fragmentShader.

Note I got problems.  Also ignore the green.  Love, Jim.
More complete shader test.

-Borders fixed.
--Uses varying vColor, for easy gradient effect.
-Motion test with simple back and forth.
Move fragment and vertex shaders to separate file

Through use of a helper function `getSource(url)`, move the fragment and
vertex shaders to separate files.

Note: Need to run the page with a webserver. An easy way for local
testing is to use `python -m SimpleHTTPServer` in the repo directory.

Note2: For glsl syntax highlighting, use: http://www.vim.org/scripts/script.php?script_id=1002
Merge branch 'shader_test'

* shader_test:
  Move fragment and vertex shaders to separate file
  More complete shader test.
  Initial commit of shader test.
  Explain GitHub Pages change