work with Ohai 7 and 6
Merge pull request #10 from thommay/ohai_7

work with Ohai 7 and 6
ignore lock files
Upgrade to rspec3

* Use transpec to automatically convert to expect syntax and so on
* Ensure that specs can run on OS X by mocking Ohai memory
fix up ohai 6 dependent test

since we're mocking ohai's memory detection anyway, we can hard code
this test, rather than depending on the system
release 0.0.8
add travis support