Add TextEdit that triggers an insert into the db.

At the moment the app works like this:

* At startup all rows in db are deleted
* When pressing tab in the textedit a note is added to the db.

It's all very ugly but it's a start.
Show latest note first.
Use ListView instead of GridLayout.

First step is just getting something up and running. My plan is to eventually
use a magazine layout a'la goggle+ but that requires me to write a custom
layout. I need to understand the basics first.

So, I'll use a ListView, a "add notes" widget and a "search notes" widget and
concentrate on getting the database logic and general architecture in place.