Updated enemy spawn code

I've tweaked the code a bit, still can't get it to do what I want it to.
I removed the position requirement from the enemy classes.
Haaalp
Merge branch 'master' of https://github.com/codered008/City_Saver

I hate you, Github

Conflicts:
	City_Saver/City_Saver/ObjectClasses/FireShooter.cs