Lays down a command database.yml file.
Merge branch 'feature/invitations' of github.com:jcarley/carleyfamily into feature/invitations

* 'feature/invitations' of github.com:jcarley/carleyfamily:
  Moving api to a rails implementation
  Removes grape.  Setting API with standard rails controllers
  Adding invites to API.
  Adds base components for supporting the API.
  Adds authentication_token to user model.  Adds initial api infrastructure.
  Adds grape gem for creating an API
  Adds binding_of_caller gem
  Whitespace cleanup
  Adds tests to the CommandBus.
  Updates rspec version
  Fixes a bug in CommandBus where a command is not found.  Removes the hook to execute the send invite command in the invite model.
  Renames generate invite command to send invite command.
  Removes observers, creates invite command with tests.