updated plugin spec to note that js-module and asset elements can be nested under platform elements.
deleting unused and useless things
removing --list
removing unused actions
adding TODOs
[BlackBerry10] Adding support for new BlackBerry10 platform

Reviewed by Bryan Higgins <bhiggins@blackberry.com>
Add leading slash to js-modules within cordova_plugins.json

This fixes loading of modules from HTML files not in project root.