Create `lib/utils` directory and move some files from `lib` to there.
Add some vector files to support `XCSSMatrix.prototype.decompose`.
Update code to reflect the additions and changes from 8f4d244 & 6e55b2a.
Move `multiply`, `inverse` and `decompose` to matrix utility lib.
Use W3C formulas and variable names.

Taken from http://dev.w3.org/csswg/css-transforms/#mathematical-description
Update browserify-ed lib, demo page and README.
Remove `grunt` & `grunt-shell` because they weren't being used.
Bump the version number.