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/SixthSense.java

@@ -18,7 +18,7 @@ import net.minecraft.world.World;
 public class SixthSense extends Spell {
 
 	public SixthSense(){
-		super(Tier.APPRENTICE, 20, Element.EARTH, "sixth_sense", SpellType.UTILITY, 100, EnumAction.BOW, false);
+		super("sixth_sense", Tier.APPRENTICE, Element.EARTH, SpellType.BUFF, 20, 100, EnumAction.BOW, false);
 	}
 
 	@Override