Small update on engine ; spells updated ; creatures targetting creatures sf.dll (+new spell and effect)

Scripts for modules : new ones and updates. 
Small improvement on Engine (display loadscreen on load game, better crtOnDeath check with addition of the func in Creature turn).
 sf.dll : Functions for creatures to target and attack other creatures (used in new script crtPCAllyOnStartCombatTurn.cs).