Change database from sqlite to postgres
Stock Capistrano 3.1 install (result of 'cap install')
Add capistrano-rails
Add rake task for automatic provisioning
Add SSH key in setup script instead of in the Dockerfile
Pull some scripting into Dockerfile and DockerImage classes
Move database.yml creation from the Dockerfile to the script
Move rails_env to per-app config and generate in script
Remove unused code and template file
Use conjure base image instead of locally building one
Pull more provision scripting from rake task into Instance class
Include all Cap-relevant settings in provision output
Include postgres container when provisioning
Add conjure gem to replace provisioning code that moved into conjure
Remove unused cruft from Capistrano config