Publishing on Firefox Marketplace

I've made a few changes in order to publish the app on Firefox Marketplace. It's now available to anyone with a FirefoxOS device on https://marketplace.firefox.com/app/qual-operadora/.

This pull request:
- includes icons for several resolutions
- allows 9-digit number search for RJ, SP and others
- displays messages when the number is not found (maybe it was a bug)
- minor layout changes (font-size for bigger screens).

The version is now 1.2.