Rework build system

* Don't concat js/css in development mode
* Minify and concat js/css for release
* Support sourcemaps for coffeescript
* Eliminate yml asset config
* Add cake task for building assets
* Manage Chrome Bootstrap via package.json
Specs were failing siliently b/c require failed
Merge pull request #95 from roykolak/build-system-rework

Rework build system