Basics for a new app

www.agileplannerapp.com/boards/173808/cards/7897

Includes:

* Gems needed for testing: RSpec, factory_girl..
* RSpec configuration files
* SimpleCov for test coverage
* Unicorn web server
* Airbrake gem for exception reporting
* Logstasher
* Database settings and PG gem for postgresql
* Jenkins build scripts

Additional,

Removed secret_token.rb in favor of secrets.yml file:

http://guides.rubyonrails.org/upgrading_ruby_on_rails.html#config-secrets-yml
Merge pull request #2 from alphagov/add-basics

Basics for a new app