Expose WebVTTParser to node.js code on exports.
Add package.json, mocha, grunt, and jshint support for node testing.
Fix initial set of lint errors in vtt.js
Add .gitignore
Add support for node.js in tests/run-tests.js, TravisCI support.
Merge branch 'master' of github.com:andreasgal/vtt.js

Conflicts:
	tests/run-tests.js
Rework run-tests.js to use node-tap for Travis. Closes #2.