Graffiti to use VistaDB

VistaDB was chosen as the default because it has better support for multiple environments (Medium Trust, 64-bit, and Mono) compared to Microsoft Access. However, if you are already using Access or simply prefer it, you will still be able to use it. In addition to VistaDB, we are also adding one more database provider, MySQL. The setup and install experience for MySQL is very similar to SQL Server. You will be find the necessary files and steps in the beta 2 download.