Fix #1 by quietly renaming the Gemfile to .gemfile.ci.

This denotes its true purpose and should keep it out of the way for
those who don't need it.
Empty suite for starters.
Add vim tempfiles to ignore. (Sorry.)

Thought I'd added that already.
Working:  ChefSpec for "loads/converges without errors."
Fix RuboCop typo.  (CI should now run cleanly.)
Environment-based approach to Gemfile rename.
Only load kitchen tasks outside of CI.  For now.