The great particle refactoring part 2: Splitting and Streamlining!

- Splits all particle textures into individual files intead of sprite sheets
- Replaces arc and lightning pulse entities with particles
- Pulls particle code up to the general ParticleWizardry so behaviours such as spin can be applied to all particle types
- Renames a few ParticleBuilder methods for conciseness.
- Adds a few new particle effects to various spells and entities, with a slight tweak to EntityMagicArrow#onBlockHit to facilitate impact effects

src/main/java/electroblob/wizardry/spell/Arc.java

@@ -30,11 +30,10 @@ public class Arc extends SpellRay {
 		
 		if(WizardryUtilities.isLiving(target)){
 		
-			if(!world.isRemote){
-				EntityArc arc = new EntityArc(world);
-				arc.setEndpointCoords(caster.posX, caster.posY + 1, caster.posZ, target.posX, target.posY + target.height / 2, target.posZ);
-				world.spawnEntity(arc);
-			}else{
+			if(world.isRemote){
+				// Rather neatly, the entity can be set here and if it's null nothing will happen.
+				ParticleBuilder.create(Type.LIGHTNING).entity(caster)
+				.pos(caster != null ? origin.subtract(caster.getPositionVector()) : origin).target(target).spawn(world);
 				ParticleBuilder.spawnShockParticles(world, target.posX, target.getEntityBoundingBox().minY + target.height/2, target.posZ);
 			}