Include dependecies to get the app started.

I was unable to boot the rails app without including 2 gems that Less
requires (see: https://github.com/seyhunak/twitter-bootstrap-rails).

Once those gems were bundled, then I needed to re-run the generator for
less as well:
  rails g bootstrap:install -f
...which resolved an error that the app was throwning
(http://stackoverflow.com/questions/13708303/variable-fontawesomeeotpath-iefix-is-undefined).
Update Rails.

This resolves a major security vulnerability, and will ensure future
users of the app bundle with the latest version of the 3.2 branch.
Remove redundancy from Readme.

The sqlite3 gem is already in the Gemfile, and will be installed by bundler.

It should not need to be installed manually. Should it?