Updated Version of MyNotes

MyNotes 2012 is a slight departure from the MyNotes sample.  All
namespaces have been changed to use "MyNotes" as the root.  Rather than
use edmx files for EF suport in the Read Model, I've added POCOs with
custom mapping.  The default is to run with a single database, rather
than two separate ones, but with room for separating the event store and
read model into two separate schemas.