(#2549) - document that the SQLite plugin is passing

@brodybits just merged the final iOS fix this morning, and is going to publish the first official version to the PhoneGap Build plugin registry.  (It's been a long time coming.)

To be precise, here's the current status of the SQLite plugin:

| Platform | Passing | Comments |
| --- | --- | --- |
| iOS | 100% | Tested on the iOS 7 iPad simulator. |
| Android 4+ | 100%* | Technicaly 99.9%, since the web worker tests aren't passing. (Who cares tho, amirite?) Filing a bug now though; I'm guessing it's the fault of Cordova rather than the SQLite plugin. |
| Android 2.3+ | unknown | I've never been able to get the test suite to pass on Android 2.3 (with or without the SQLite plugin) due to some callback from the HTTP adapter not returning. Also, too many of the tests are not ES3-compliant and even with the shims, they still fail. This is a big TODO for us and is not the fault of the plugin, which as far as I can tell works perfectly in Android 2.3 for storing local data. |
| Windows Phone 8 | unknown | I don't have a WP8 device, but @brodybits informs me that the tests are all passing except for the unicode tests, which means that the only thing that might not be working with PouchDB is secondary indexes. |


Thanks again @nolanlawson for your efforts to get the integration with the sqlite plugin right. I would also like to recommend giving preference to the sqlite plugin over `idb` since `IndexedDB` would also encounter size limitations imposed by the browser and also the sqlite plugin database files are automatically backed up by iCloud.