[#20] wired up login form and log out button for Phonegap Build integration
[#20] if user has signed in, automatically log out of PGB on closing the app.
[#20] wired up the build button to invoke phonegap-cli's build api
removed all to phonegap-cli serve api, switched over to phonegap-soundwave module for the serve functionality
Merge pull request #26 from hermwong/build

prototype build integration & integrate with phonegap-soundwave