Core: add trip_table parameter to trip-functions

Currently trips are added to the global trip table. If we want to
make dive-import undoable, we should be able to parse trips of a
log-file into a distinct table. Therefore, add a trip_table
parameter to
	- insert_trip()
	- create_and_hookup_trip_from_dive()
	- autogroup_dives()
	- unregister_trip()
	- remove_dive_from_trip()

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

mobile-widgets/qmlmanager.cpp

@@ -1280,7 +1280,7 @@ bool QMLManager::undoDelete(int id)
 		return false;
 	}
 	if (deletedTrip)
-		insert_trip(deletedTrip);
+		insert_trip(deletedTrip, &trip_table);
 	if (deletedDive->divetrip) {
 		struct dive_trip *trip = deletedDive->divetrip;
 		deletedDive->divetrip = NULL;