Merge pull request #28 from johnnyshields/name-improvement

Minor method name/responsibilty improvement + Travis CI
Add a rakefile

Update .travis.yml - recognize gemfiles for Mongoid 2 and 3.
Remove mongoid-two gemfile lock.
Don't ignore log directory
Use stdout for logging instead of a file
Add rake to mongoid-two gemfile
Test for 1.9.2, 1.9.3, and 2.0.0
Compatibility with Mongoid 2