Basic Value-Class-Pattern support & a Travis-CI configuration

Hi Kartik,
I added simple vcp handling in the parse_properties module, so that the last remaining nosetest passes. Also corrected a typo in requirements.txt that I made in my previous PR. Oops. 

And added a .travis.yml configuration. If you haven't used it before, Travis automatically builds and tests each github commit and incoming pull request for you (in Python 2.6, 2.7, and 3.3 ... 3.2 doesn't build for now). It is pretty great. If you're interested (totally up to you), you give it access to your GH account and enable for a specific repository, e.g., https://travis-ci.org/kylewm/mf2py
Cheers,
Kyle