Spell hierarchisation and refactoring, plus miscellaneous renaming and minor refactoring

- Adds new generic spell superclasses which aim to group spells such that duplicate code is eliminated, and functions standardised, as much as possible.
- Removes numerous spell classes which are no longer required as a result of this change, and replaces them with instances of the relevant generic spell classes.
- Changes the remaining spell classes to fit with the new system, mostly by having them extend the generic spell classes.
- Completes the transfer of particle spawning to the ParticleBuilder system.

src/main/java/electroblob/wizardry/entity/living/EntityDecoy.java

@@ -18,12 +18,14 @@ import net.minecraft.world.World;
 
 public class EntityDecoy extends EntitySummonedCreature {
 
+	/** Creates a new decoy in the given world. */
 	public EntityDecoy(World world){
 		super(world);
 	}
-
-	public EntityDecoy(World world, double x, double y, double z, EntityLivingBase caster, int lifetime){
-		super(world, x, y, z, caster, lifetime);
+	
+	@Override
+	public void setCaster(EntityLivingBase caster){
+		super.setCaster(caster);
 		this.setAlwaysRenderNameTag(caster instanceof EntityPlayer);
 	}