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/spell/Leap.java

@@ -15,7 +15,7 @@ import net.minecraft.world.World;
 public class Leap extends Spell {
 
 	public Leap(){
-		super(Tier.BASIC, 10, Element.EARTH, "leap", SpellType.UTILITY, 20, EnumAction.NONE, false);
+		super("leap", Tier.BASIC, Element.EARTH, SpellType.UTILITY, 10, 20, EnumAction.NONE, false);
 	}
 
 	@Override
@@ -23,7 +23,7 @@ public class Leap extends Spell {
 
 		if(caster.onGround){
 
-			caster.motionY = 0.65 * modifiers.get(SpellModifiers.DAMAGE);
+			caster.motionY = 0.65 * modifiers.get(SpellModifiers.POTENCY);
 			caster.addVelocity(caster.getLookVec().x * 0.3, 0, caster.getLookVec().z * 0.3);
 
 			if(world.isRemote){