Merge branch 'hotfix/0.0.3.4'
added to admin section: which users are under the age of 13 #1283
bump chunky_png
bump guard
bump rake
bump mime-types
bump oauth2
Refactor script/server

* Made style consistent
* Add helper functions to print messages
* Abort script if critical command fails
* Made number of started Sidekiq workers configurable again
bump safe_yaml
bump omniauth-twitter
bump client_side_validations
bump faraday
bump rspec-mocks
bump selenium-webdriver
bump haml
bump omniauth
bump foreigner
bump cucumber
bump fog
bump hike