v4.0.0

* Updated `icons.scss` to use `@each` loops.
* Changed name of CSS output from `kraken.css` to `main.css`.
Updated .grid-img
Added SVG support a doc generator
Removed HTML5 shim
Added SVG feature detection
Updated read me
Wrapped feature detections in IIFE
Added additional link to SVG styling
Updated src
Updated icons
Added documentation
Updated documentation
Updated documentation
Updated docs with Download instructions
Merge pull request #118 from cferdinandi/development

v4.0.0