* This is in progress code. The plan is to support all literals before
beginning to cleanup and dedup the mutation generation. Have to
understand the AST and the possible mutations more in depth before
making structural decisions here.
* Adjust metrics
* Add initial integration spec on method matching
* Yard and Heckle coverage is at 100% (heckle cov is disputable)
* Rcov does not really make sense as MRI 1.8 cannot reach all code
paths.
* This infrastructure, especially the rake tasks should be
gemified at some point in the future. I copied exactly the same
bytes many times in the last month.
