Added UMD structure fixes

https://github.com/cferdinandi/kraken/issues/92
Merge pull request #6 from cferdinandi/umd-fix

Added UMD structure fixes
updated readme
Various updates

* Switched to Ruby Sass.
* Fixed unit test paths.
* Switched to event bubbling.
Merge pull request #7 from cferdinandi/event-bubbling

Various updates
Updated gulpfile.js
Updated event listener filter
Merge pull request #8 from cferdinandi/dev

Updated event listener filter
Added support for checkboxes
Merge branch 'development' into gh-pages