Make tests run on Travis

[freenerd]

Looks like it's breaking because Zuul wants to be executed in the browser?

[freenerd]

@planemad do you want to have a look at this again? tests also don't work for me locally with:

$npm test

> [email protected] test mapbox-match.js
> zuul --local -- test/test.js

open the following url in a browser:
http://localhost:51252/__zuul
module.js:338
    throw err;
          ^
Error: Cannot find module 'st'
    at Function.Module._resolveFilename (module.js:336:15)
    at Function.Module._load (module.js:278:25)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at Object.<anonymous> (mapbox-match.js/test/server.js:1:72)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)

[planemad]

@freenerd don't think I can look into this till next week. Just got back from vacation and have my hands full with priority work. Can this wait?