Replace .rvmrc files with .ruby-version in root dir
Update to Ruby 1.9.3-p429
Update to latest version of twitter gem (4.6.2)

  - Upgrade to the latest version of the twitter gem to gain
    compatibility with Twitter API v1.1.
  - Teach the collector about the need for OAuth credentials, since
    Twitter API v1.1 requires authentication via OAuth.
  - Teach the collector to grab the 50 most recent tweets
  - Regenerate VCR cassette to reflect an API v1.1 request
  - Update integration specs to test against recent tweets
Update to latest version of foursquare2 (1.9.7)

The new version of stratify-twitter needs faraday 0.8.0 or greater. So,
we need to use a version of foursquare2 that is compatible with a newer
version of faraday. This upgrade should do the trick.
Bump stratify-foursquare version to 0.1.4.2
Use the Twitter @username as the collector summary

When displaying the collectors in the collector list, show the Twitter
@username as the summary info for each Twitter collector.
Bump stratify-twitter version to 0.1.5
Update stratify-rails to use stratify-twitter 0.1.5

  - Fixes #3.
  - Also required updating stratify-rails to use stratify-foursquare
    0.1.4.2. See details in 8f56ece.