Initial release of isle of Bios instance

* Implemented NPC_COMET
* Adjusted skillratio for NPC_COMET. Thanks to @secretdataz !
* Fixed typo, thanks to @Lemongrass3110 and @zackdreaver !
- Replaced Morroc -> Morocc and Reaper Yanku -> Grim Reaper Ankou
* Fixed typo in mob_db.txt, thanks to @talesofragnarok 

Thanks to https://www.divine-pride.net/ for a lot of information !