Fix indentation.
Fix unneeded fat arrows.
Update coffee-script gem.
Update i18n gem.
Update websocket-driver gem.
Update minitest gem.
Add quiet_assets gem.
Move date range controller methods into a concern.
Make the balance calculator work with arbitrary date ranges.
Restore account balance graph behaviour.
Set date range metadata for balances.
Update bootstrap-sass gem.
Update jasmine-rails gem.
Update virtus gem.
Update rspec gems.
Update nokogiri gem.
Update shoulda-matchers gem.
Update uglifier gem.
Update slop gem.
Add unicorn gem.