Use experimental devtools setup to remove boilerplate
Adapt devtools init simplification and add heckle config
Merge branch 'master' into devtools
Update to more modern devtools under datamapper org

Also port to rspec2, there are uncovered mutations
Run rake ci under travis as devtools is prepared or this
Refactor to kill some mutations
Adjust flay score
Bundle yard group on travis for metrics
Sync Gemfile.devtools
Merge branch 'master' into devtools

Conflicts:
	.travis.yml
	Gemfile
	adamantium.gemspec
	config/flay.yml
	config/flog.yml
	lib/adamantium/freezer.rb
	tasks/metrics/ci.rake
Update useage of devtools api

Also reset metrics and use correct reek smell config keys
Allow failures under ruby-head
Sync devtools