Added Quest Gatherer & Parser

- Fixed a bug on GameObject parser
- Added parser for QuestRequest
- Added gatherer for QuestRequest: Use the file quest_tables.sql inside
CustomSQL to create the 3 used tables. Then, you'll be able to gather
your own quest data to import it into the tables.

* Please: Note that questing is not implemented yet in Arctium. Also,
the table fields has guessed names, so you can work on it so much as you
want...