Check in support for automated test cases, including plugin support

Now, we just need to write the real test cases...
Invoke the tests from a separate test file instead of hardcoding them into the index.html

This doesn't work with phantom.js but it does work in the emulator.
Check in a clarification to the README that the javascript tests don't work with plugins
Merge pull request #7 from shankari/cordova-crossplatform

Check in support for automated javascript unit test cases