Add tests:
- rubocop
- knife cookbook test

Use strainer to launch test:
$ bundle exec strainer test
rubocop autocorrect
Fix rubocop
Fix all Foodcritic
Change way of testing with rake instead of strainer

Add documentation
Change .gitignore to .gitkeep
Fix merge faux pas
Don't epic fail on FC014
Additional rubocop / foodcritic fixes
Merge pull request #95 from opdemand/carmstrong/rebase_pr70

Rebases #70 against master