Nuke inflexible rspec strategies
Adjust flay total
Adjust reek
Instantiate strategies

Doing that stuff on singletons is wired. Future strategies will have a
state.
Reconnect static strategies to cli
Update README
Merge branch 'master' of github.com:mbj/mutant into flexible-rspec

Conflicts:
	config/flay.yml
Merge branch 'master' into flexible-rspec
Merge branch 'master' into flexible-rspec
Merge branch 'master' into flexible-rspec

Conflicts:
	lib/mutant/cli.rb
	lib/mutant/constants.rb
	lib/mutant/strategy/rspec/dm2/lookup.rb
	spec/integration/mutant/rspec_killer_spec.rb
	spec/unit/mutant/cli/class_methods/new_spec.rb
	spec/unit/mutant/strategy/rspec/dm2/lookup/method/instance/spec_files_spec.rb
	spec/unit/mutant/strategy/rspec/dm2/lookup/method/singleton/spec_files_spec.rb
Merge branch 'master' into flexible-rspec

Conflicts:
	lib/mutant/strategy/method_expansion.rb
	lib/mutant/strategy/rspec/dm2.rb
	lib/mutant/strategy/rspec/dm2/lookup.rb
	lib/mutant/strategy/rspec/dm2/lookup/method.rb
	spec/unit/mutant/strategy/method_expansion/class_methods/run_spec.rb
	spec/unit/mutant/strategy/rspec/dm2/lookup/method/instance/spec_files_spec.rb
	spec/unit/mutant/strategy/rspec/dm2/lookup/method/singleton/spec_files_spec.rb
Nuke rubocop
Add Kernel#send => Kernel#public_send mutation

Closes #78
Emit mutator from Object#gsub => Object#sub

Closes #85
Update metrics thresholds
Upgrade gem dependencies

* Add rom-rb/rubocop back
* Update yardstick to use git repository instead of gem
Add missing YARD docs
Add nthref mutator

Closes #20
Bump parser dependency to ~> 2.0.0.pre6
Readd -r / --require option

Closes #58