Cloud tests

***Don't Merge until @s0undt3ch has signed off on and merged PR 18 on salt-testing!!

I've started some basic salt-cloud tests to test basic "create an instance" and "destroy the instance" functionality, including documentation about how to run and write the tests. 

@s0undt3ch - Since we don't want these tests to run automatically on jenkins, and the --run-cloud-provider flag is set in salt-testing, I didn't add anything to the integration init file like usual. Is that the correct approach?

@techhat @thatch45 ping - review appreciated!