Progress on showing a single term

Lots of small changes:

1.  Updated ruby to patch level 385
1.  gem ```barber``` removed from ```Gemfile``` because latest version of ```ember.js``` covers it.
1.  Latest version of ```ember.js```.
1.  Fixed whitespace issues in ```README.md```.
1.  Juggled routes in ```router.js.coffee```.
1.  Specified ```term.id``` in ```index.handlebars``` to get term ID passed in URL.