- move sources from individual tables to a single table with searchable format
- implemented 'group by source' and most source-related filters in items.php
note: some fields are not yet set and searches against those will yield no usable result

- fixed js-error; always expecting array characters in g_user
- fixed rep gain on first login, when using external auth
- fixed wrong lootIds in ?_objects, where the field size was too small