Converted the test-unit tests to RSpec 2 tests.
Added Service#hostname.
Added spec for on_body.
Added a spec for on_response.
Added a spec for calling .shorten with an alternate service.
Fixed a typo.
Fixed SnipURL.
Added test coverage for the Services.
Improved the specs for ShortURL.shorten.
Attempted to fix Shorl#on_body
shorl.com returns a unique passworded URL for each URL.
shorl.com uses GETs
Oops, should be 12 characters, not 13.
Merge pull request #11 from postmodern/rspec

switching to rspec