Webview documentation

Phonegap has much better Webview documentation than Cordova itself currently has:

http://docs.phonegap.com/tutorials/develop/1-embed-webview/ios/
http://docs.phonegap.com/tutorials/develop/1-embed-webview/android/
http://docs.phonegap.com/tutorials/develop/1-embed-webview/android-with-extension/

We should make sure that Cordova's documentation at least includes the same amount of information.

Start by comparing the three linked PhoneGap Webview pages for iOS, Android, and Android with extension, then locate the corresponding Cordova documentation. Done means Cordova documents those Webview topics with at least the same amount of information.

Written by the indexing model from the issue text.