Allow config files names `.reek`
Fix Gemfile comment to not point to some other gem
Remove superfluous spec setup code
Fix code quality tests

- Depend on flay
- Drop simian as a test tool
- Auto-include spec helpers in rspec's new namespace
- Remove unused quality/spec_helper.rb
Merge pull request #157 from troessner/issue-accept-reek-dotfile

Allow config files named `.reek`
Merge pull request #158 from troessner/clean-up-code

Clean up code