Clean up models_controller.rb before real changes.

Lots of bad whitespace.
Update rubyzip version with new API.

Taverna Player is the only dependency that uses rubyzip so use the version of
that which uses the latest rubyzip API too.
Merge branch 'new-zip'

* new-zip:
  Update rubyzip version with new API.
  Clean up models_controller.rb before real changes.