Update Gemfile: remove twitter-1.6.0 as it has been yanked.
Update factory_girl and bring specs up to date
Update everything. Rails 3.2.9, omniauth/strategies, formtastic, friendly_id
Get JS and CSS assets working within assets pipeline
Get Image assets working within assets pipeline
New Twitter API no longer supports rate_limit_status
Update to rails-3.2.11
Add additional OmniAuth providers

I'm kind of torn about including these as dependencies given that not 
everyone will want to use them all, but it makes settings-sample.yml
work out of the box. I may tweak the setup instructions to reference
this more at some point.
Remove ruby version specification from Gemfile

We run tests on Travis under several different rubies, so we don't want
to lock things down here.
Make good on that promise to test on multiple rubies
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Point to our branch
sexy thin and better errors