added pistol world texture
added healthpack texture
Merge branch 'master' of https://github.com/liam-middlebrook/Navier-Boats

Conflicts:
	Navier-Boats/Navier-Boats/Navier-Boats/Engine/Entities/LivingEntity.cs
	Navier-Boats/Navier-Boats/Navier-Boats/Game1.cs