Replace lib.js with gems, remove Enfase, and more

* Replaced lib.js with d3_rails, lodash-rails gems and vendorized typeahead.js

* Removed the model Enfase

* Removed tons of useless views

* Root now redirects to 'dashboard#first' which then redirects to the first
  available dashboard

* Moved `main.js` into something more Rails-like:
    - d3.forceLayout implements the forceLayout method
    - dashboards implements the `doTheThing` method which does the thing
    - the thing is called to be done from withing the view, specifically dashbaord.show

Cheers! :)