Wrote all the tests for current functionality

- Wrote minitest/mocha tests under the test/ folder
- Added bundler to make sure all the neccesary gems are in place
- Added some code to the gem version to make sure it would be loaded more than
  once as part of the tests
- Cleaned up the require statements in lib/how_slow.rb
- Added documentation to the README about how to run the tests
Remove Gemfile.lock per http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/
Added Gemfile.lock to .gitignore
Version bump.
Removed debugging output.