Debugged version of Gigas

* Better moves for its spirit balls
* Fixed a bug with the sensor of making Gigas appearing
* Fixed problems with spirit balls behavior
* Attack consequences for Gigas are now OK
* More efficient way to manage the teleport moment

Next tasks :
* Lizalfos summoning and poison cloud apparition with effect before it
* Make explosion on Gigas when he dies
* Create the thunder monster
Reordered project_db.dat and set Gigas as mini-boss