Update Makefile.PL.
Remove Ouch, issue: #2.
Fix SQLite support, other changes:

Ouch more remaining ouch;
Do not use login dialog for sqlite;
Update the SQLite module to use exceptions, add table info method;
Update POD in model, rename sub from db_connect_inst to db_connect_new;
Fix status message if no user and no db;
Show dialog when not connected.

TODO: test all connection error scenarios.
Update README and change to markdown.
Remove obsolete release note.
Update about dialog.
Small tweaks.

Correct PODs and change notebook page labels.
Merge branch 'virtual'