Initial rubocop support for recipes.

Per the mailing list thread, introducing Rubocop as a replacement for Tailor.
Assuming Jenkins likes this, more pedantic patches will follow to make Rubocop
happy. So far this is just spacing issues and adding UTF-8 headers, but more
work will need to be done to remove all of the changes for the .rubocop-todo.yml

Change-Id: I590ac5ec03ce6a00dd73027d6798e36105a32af1