uiv4

Initial commit

ADDED: tags folder, empty
ADDED: branches folder, empty
ADDED: trunk
ADDED: vs solution with 3 projects for PG backend ORM, backend ORM interface, application main, plus the setup with Npgsql

At the pure intra-table level, the basics for ORM are complete. But file manager really needs some fancier queries later on. Also missing are cross-table queries, planned be in a dedicated PgStore<somethingcross>Manager directly backed by PgQuery<somethingcross> and the different existing table managers, without additional objects and managers. This is also not urgent - having something on top generating and using entries has priority. Cross-table updates are not planned.