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/EntityBlazeMinion.java

@@ -56,29 +56,12 @@ public class EntityBlazeMinion extends EntityBlaze implements ISummonedCreature
 		this.casterUUID = uuid;
 	}
 
-	/**
-	 * Default shell constructor, only used by client. Lifetime defaults arbitrarily to 600, but this doesn't matter
-	 * because the client side entity immediately gets the lifetime value copied over to it by this class anyway. When
-	 * extending this class, you must override this constructor or Minecraft won't like it, but there's no need to do
-	 * anything inside it other than call super().
-	 */
+	/** Creates a new blaze minion in the given world. */
 	public EntityBlazeMinion(World world){
 		super(world);
 		this.experienceValue = 0;
 	}
 
-	/**
-	 * Set lifetime to -1 to allow this creature to last forever. This constructor should be overridden when extending
-	 * this class (be sure to call super()) so that AI and other things can be added.
-	 */
-	public EntityBlazeMinion(World world, double x, double y, double z, EntityLivingBase caster, int lifetime){
-		super(world);
-		this.setPosition(x, y, z);
-		this.casterReference = new WeakReference<EntityLivingBase>(caster);
-		this.experienceValue = 0;
-		this.lifetime = lifetime;
-	}
-
 	// EntityBlaze overrides
 
 	// This particular override is pretty standard: let the superclass handle basic AI like swimming, but replace its
@@ -154,31 +137,13 @@ public class EntityBlazeMinion extends EntityBlaze implements ISummonedCreature
 
 	// Recommended overrides
 
-	@Override
-	protected int getExperiencePoints(EntityPlayer player){
-		return 0;
-	}
-
-	@Override
-	protected boolean canDropLoot(){
-		return false;
-	}
-
-	@Override
-	protected Item getDropItem(){
-		return null;
-	}
-
-	@Override
-	protected ResourceLocation getLootTable(){
-		return null;
-	}
-
+	@Override protected int getExperiencePoints(EntityPlayer player){ return 0; }
+	@Override protected boolean canDropLoot(){ return false; }
+	@Override protected Item getDropItem(){ return null; }
+	@Override protected ResourceLocation getLootTable(){ return null; }
+	@Override public boolean canPickUpLoot(){ return false; }
 	// This vanilla method has nothing to do with the custom despawn() method.
-	@Override
-	protected boolean canDespawn(){
-		return false;
-	}
+	@Override protected boolean canDespawn(){ return false; }
 
 	@Override
 	public boolean canAttackClass(Class<? extends EntityLivingBase> entityType){