Use the shipped source patterns as a test suite

[bmuenzenmeyer]

Integrate with Travis CI

[bmuenzenmeyer]

@dmolsen @bradfrost Have you guys considered something like this for patternlab-php? It seems like a great way to spot regressions as we roll out new portions of the tool

[dmolsen]

@bmuenzenmeyer -

I've worked hard to eliminate my use of glob() so I can come up with a real test suite for PL. Basically, in the PHP version I couldn't create a virtual filesystem for the tests. Now, hopefully, I can and it's definitely on my to do list :)