Kanji Info for Ankidroid! First version.

I have written a bit of code to extend the reviewer to show some information about kanji during reviews. It's very similar to the Anki plugin found here: https://ankiweb.net/shared/info/191833583. In fact it's using the same data file. There is also a setting to turn it on or off.

I've been using this for some time now and it's working nicely so far. If there's anything that needs fixing for this to be included let me know.