Initialise testing, and added vendor Script files.

Rake task `cruise` will run Teaspoon, piping output to Tapout for formatting, and then run RSpec. We’re now ready to add live specs and code.

Several auto-generated files (*cough*Teaspoon helper*cough*) have been edited minimally to make them Rubocop-compliant. Generated files have simply had the complaining cops silenced; files such as `application_controller.rb` and `application_helper.rb` have had commentary added to satisfy the cops.

IMPORTANT NOTE: The summary table below DOES NOT include inline Rubocop disabling **in generated files** such as `teaspoon_env.rb`

RSpec status:	 		0 examples, 0 failures
Teaspoon status:	 	0 tests: 0 pass, 0 fail, 0 errs, 0 todo, 0 omitted
Custom RuboCop rules:	None
Inline RuboCop disabling:	None (in non-generated code)

Trello cards authorising work:
* https://trello.com/c/4heSDdbz/3-add-required-third-party-script-libraries (closed)
* https://trello.com/c/hIHYdvwL/2-create-basic-app (reopened, then closed)
* https://trello.com/c/BEM54oSB/12-update-gemfile-for-app (reopened, then closed)