Manage different Cordova versions

Ability to target different supported cordova versions... Tools at least should offer the ability to migrate to the latest supported Cordova version.
Also all the cordova templates and files should be able to update independent of the rest of the plugins.

This requires a UI for switching targeted cordova runtimes.

.cordova/config.json can be populated with the engine information. Phonegap uses the following format.
{"lib":{"www":{"id":"phonegap","version":"3.0.0","uri":"https://github.com/phonegap/phonegap-app-hello-world/archive/3.0.0.tar.gz"}},"id":"AAA","name":"HelloWorld"}