Fix vows test suites path. Wildcard matched directories and crashed Travis.

No idea why the problem hasn't manifested on Windows.
Merge branch 'setup-travis' into develop
Downgraded minimum node version requirement.

Now that Travis can be used to run the tests on node v0.6, it's safe to try to support it. I'll be warned if anything breaks on older versions, but maybe it'll just work for now.
Merge branch 'setup-travis' into develop
Add Travis build status image.
Merge branch 'setup-travis' into develop
Merge branch 'develop'
Make Travis build status image load for master branch.