Update brakeman to 2.4.3
Update rubocop to 0.20.1
AllCops/Excludes was renamed to AllCops/Exclude
Prefer skip_before_action over skip_before_filter
Prefer before_action over before_filter
Use nested module/class definitions instead of compact style.
%w-literals should be delimited by ( and )
Add brakeman configuration

- add config/brakeman.yml
- make sure bin/quality will exit on warn from brakeman
- skip CheckForgerySetting check
Move rubocop configuration to config/rubocop.yml
Update rails_best_practices options

- Do not include feature files
- Do not skip lib/templates since we have no them here
- Do not skip config
Merge pull request #57 from fs/update-quality-tools

Update quality tools