Remove all files before adding new app.

In prepration for an updating the app, first
all of the files must be removed.
Add README.md and UPDATING.md
Copy Apache Cordova Hello World.
Update app for PhoneGap.
Add config.xml
Add LICENSE.
Update splash screens and icons to use PhoneGap logo.
Update from incubator-cordova-app-hello-world
Remove CSS update step from UPDATING.md
Update from incubator-cordova-app-hello-world.
Update www/config.xml
Whoops thought I was looking at my fork
Use phonegap.js instead of cordova-x.x.x.js
[www] changing phonegap javascript reference

The current index.html has a versioned cordova.js. Changing it to
a versionless include and using the phonegap file instead of cordova.
[config] bumping phonegap version to 2.1.0
Merge branch 'master' of github.com:phonegap/phonegap-start
[doc] Update UPDATING.md instructions.
[app] Version 2.2.0
Update README.md

update cordova hello world link to https://github.com/apache/cordova-app-hello-world
Merge pull request #56 from netalex/patch-1

[doc] Update URL reference to cordova-app-hello-world.