A first go at some unit tests

Used the layout from vagrant-aws [https://github.com/mitchellh/vagrant-aws] as a guide to get started
Updates the gem lock file
Adds some information on how to run tests
Adds default checks for the winrm config module
Adds tests to make sure we can override a default
Merge pull request #32 from mgriffin/unit_tests

Some basic unit tests to start off with