Fix Travis-CI build
We already use Appraisal for regression tests. Combining that with Travis-CI's gemfile management blows up.
Specify pessimistic version constraint with two digits of precision
Assumes semantic versioning of `shoulda-context` and `shoulda-matchers`. See also: #232.
Fix travis ci build
Update copyright year to 2013
Use https instead of http in Gemfile
add license information to the gemspec
this way it can be used with rubygems.org API
The Ruby, it shines!