added hasFlag(...) method to MUDObject. changed code in MUDServer that did obj.flags.contains(...) to use hasFlag(...). added a couple rooms and some exits to testing database. fixed ObjectDB save routine to properly preserve ignored object data handled (which is handling by loading a 'locked' NullObject as a placeholder). tweaked ObjectLoader a little, mostly cosmetic/spacing changes. help files for @lock, @unlock updated?