rename less and coffee source folders to css and js
setup `grunt dev` and `grunt preview`
using oboe to do json streaming and get response headers
workflow improvement

* set up a place for css libs
* dist also copy vendor
* dist doesn't copy less and coffee under libs
* livereload assets
add bootstrap css for styling, less for style authoring
setup a UI prototype, including designing a LOGO
livereload the js and css libs
a still ugly popup implementation