* Uses npm to download latest swagger-js (for now. When swagger-js is
   released we will replace git address with actual swagger-ui)

* Uses `postinstall` to generate `browser` folder of swagger-ui. This
 can go when swagger-ui is published.

to avoid leaking globals other than SwaggerUi and swaggerUi

TODO: we should remove swaggerUi global dependency too

By passing parent view as an option to child views, child views can
access parent views and eventually can access model of MainView

There is alos a new domEl option available for SwaggerUI constructor.
User can send domEl instead of dom_id to specifiy which element they
want to render to

Fixes #949

Fixes #949

This includes tasks for coffe , concat, minfification and copying lib