Fix whitespace
Refactor specs and remove unnecessary code

* The specification for the file and line number were only necessary
  when using string class_eval. Now that the code uses define_method
  it is no longer necessary since ruby takes care of those details.
Fix memoized method to have an arity of 0
Fix fallback reek task to be within the metrics namespace
Update flog threshold
Add ruby 2.0 to list of rubies to test with

* Reorganize rubies
* Add irc notifications when the build fails
Copy Gemfile groups from devtools