Add `strong_parameters`, fix devise for it
Fix `decent_exposure` to work with `strong_parameters`
Upgrade to Rails4 + Ruby 2.0
Update rails_best_practices config, rempve old scripts
Merge `flatstack:rails-4` branch
Update bullet config; update database.yml.example to work with pg; update bin/ci to run feature tests
Fix features and add parameter sanitizer for User
Merge pull request #92 from timurkhafizov/upgrade-to-rails4

[WIP] Upgrade to rails4
Use devise from master.
Remove any guard stuff.
Remove assets group
Install gems to .bundle
Update config files
Update brakeman to 2.1.0
Use 1.9 hash syntax
Update jquery-rails to 3.0.4
Introduce bin/server
Use sendgrid only if ENV['SENDGRID_USERNAME'] exists
Update README
Update rspec to 2.14.1 and rspec-rails to 2.14.3
Do not use bundle exec in bin/ci