* I do not use 1.9.3
* Also keeping them in each file increases mental overhead (true it *can* be autoamted)
* None of the files encodes NON ASCII chars.
* I do not expect it makes any difference, since nobody programmatically
will consume strings generated by mutant under the assumption they are UTF-8 encoded.
* 1.9.3 Users have to deal with the encoding fuckup under ruby anyways.
* Moves all rspec integration into Mutant::Rspec namespace.
* Removes the unused --rspec-level option
* Mutant::Rspec::Strategy is smelly, has no state. Will make sense with
future commits.