Added aegis support, bugfixes, gid <> aid problems

- fixed illustration images not showing up
- fixed aid <> gid mismatch
- added aegis packets and made them configurable (ROConfig.usePacketVersion2)

There are just some few packets that use gid (character id) instead of aid (account id).
- Packets from character server
- Item information for creator information

The id of an npc is equivalent to the aid of a character. It should be handled the same.