Adds has_scope, flay, flog, brakeman and shoulda-matchers

* [**shoulda-matchers**](https://github.com/thoughtbot/shoulda-matchers) - Provides Test::Unit- and RSpec-compatible one-liners that test common Rails functionality. These tests would otherwise be much longer, more complex, and error-prone.
* [**has_scope**](https://github.com/plataformatec/has_scope) - Has scope allows you to easily create controller filters based on your resources named scopes.
* [**Flay**](https://github.com/seattlerb/flay) - Flay analyzes code for structural similarities. Differences in literal values, variable, class, method names, whitespace, programming style, braces vs do/end, etc are all ignored. Making this totally rad.
* [**Flog**](https://github.com/seattlerb/flog) - Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in.
* [**Brakeman**](https://github.com/presidentbeef/brakeman) - A static analysis security vulnerability scanner for Ruby on Rails applications.