Shortened names of column definition accessors.
Fixed lazy loading of foreign keys.
Switched back to fields for stored_values.
Added more status tests.
Added lazy alloc of foreign key proxies.
Cleaned up field defaults.
Shortened definition to def.
Shortened generate to gen.
Renamed modified to dirty.
Shortened context to cx.
Shortened record to rec.
Shortened columns to cols.
Implemented creation of primary and foreign keys.