Adding phone gap getting started tutorial
Merge branch 'initial-site-content' of github.com:orbotix/DeveloperResources into phonegap-getting-started

* 'initial-site-content' of github.com:orbotix/DeveloperResources:
Adding advanced tutorials in getting started
Removing advanced title for now
Add line breaks to section titles
Fix some typos
Merge pull request #3 from orbotix/phonegap-getting-started

Adding intermediate tutorials