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/item/ItemFirebomb.java

@@ -30,9 +30,8 @@ public class ItemFirebomb extends Item {
 		player.playSound(SoundEvents.ENTITY_SNOWBALL_THROW, 0.5F, 0.4F / (itemRand.nextFloat() * 0.4F + 0.8F));
 
 		if(!world.isRemote){
-			EntityFirebomb firebomb = new EntityFirebomb(world, player);
-			// This is the standard set of parameters for this method, used by snowballs and ender pearls.
-			firebomb.shoot(player, player.rotationPitch, player.rotationYaw, 0.0f, 1.5f, 1.0f);
+			EntityFirebomb firebomb = new EntityFirebomb(world);
+			firebomb.aim(player, 1.5f);
 			world.spawnEntity(firebomb);
 		}
 

src/main/java/electroblob/wizardry/item/ItemPoisonBomb.java

@@ -30,9 +30,8 @@ public class ItemPoisonBomb extends Item {
 		player.playSound(SoundEvents.ENTITY_SNOWBALL_THROW, 0.5F, 0.4F / (itemRand.nextFloat() * 0.4F + 0.8F));
 
 		if(!world.isRemote){
-			EntityPoisonBomb poisonbomb = new EntityPoisonBomb(world, player);
-			// This is the standard set of parameters for this method, used by snowballs and ender pearls.
-			poisonbomb.shoot(player, player.rotationPitch, player.rotationYaw, 0.0f, 1.5f, 1.0f);
+			EntityPoisonBomb poisonbomb = new EntityPoisonBomb(world);
+			poisonbomb.aim(player, 1.5f);
 			world.spawnEntity(poisonbomb);
 		}
 

src/main/java/electroblob/wizardry/item/ItemSmokeBomb.java

@@ -30,9 +30,8 @@ public class ItemSmokeBomb extends Item {
 		player.playSound(SoundEvents.ENTITY_SNOWBALL_THROW, 0.5F, 0.4F / (itemRand.nextFloat() * 0.4F + 0.8F));
 
 		if(!world.isRemote){
-			EntitySmokeBomb smokebomb = new EntitySmokeBomb(world, player);
-			// This is the standard set of parameters for this method, used by snowballs and ender pearls.
-			smokebomb.shoot(player, player.rotationPitch, player.rotationYaw, 0.0f, 1.5f, 1.0f);
+			EntitySmokeBomb smokebomb = new EntitySmokeBomb(world);
+			smokebomb.aim(player, 1.5f);
 			world.spawnEntity(smokebomb);
 		}
 

src/main/java/electroblob/wizardry/item/ItemWand.java

@@ -375,7 +375,7 @@ public class ItemWand extends Item {
 		// normal mob on full 20 health, but wither 2 for the same duration only deals about 6 hearts of damage in
 		// total.
 		if(this.element == spell.element){
-			modifiers.set(SpellModifiers.DAMAGE, 1.0f + (this.tier.level + 1) * Constants.DAMAGE_INCREASE_PER_TIER,
+			modifiers.set(SpellModifiers.POTENCY, 1.0f + (this.tier.level + 1) * Constants.DAMAGE_INCREASE_PER_TIER,
 					true);
 		}
 
@@ -401,7 +401,7 @@ public class ItemWand extends Item {
 
 	private boolean selectMinionTarget(EntityPlayer player, World world){
 
-		RayTraceResult rayTrace = WizardryUtilities.standardEntityRayTrace(world, player, 16);
+		RayTraceResult rayTrace = WizardryUtilities.standardEntityRayTrace(world, player, 16, false);
 
 		if(rayTrace != null && WizardryUtilities.isLiving(rayTrace.entityHit)){
 

src/main/java/electroblob/wizardry/item/ItemWizardArmour.java

@@ -7,11 +7,11 @@ import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
 
 import electroblob.wizardry.Wizardry;
+import electroblob.wizardry.block.BlockStatue;
 import electroblob.wizardry.constants.Constants;
 import electroblob.wizardry.constants.Element;
 import electroblob.wizardry.registry.WizardryAdvancementTriggers;
 import electroblob.wizardry.registry.WizardryTabs;
-import electroblob.wizardry.spell.Petrify;
 import net.minecraft.client.model.ModelBiped;
 import net.minecraft.client.util.ITooltipFlag;
 import net.minecraft.entity.Entity;
@@ -142,7 +142,7 @@ public class ItemWizardArmour extends ItemArmor {
 		// fix, considering how long I spent trying to do this before - a bit of lateral thinking was all it took.
 		// Do note however that a texture pack could override this.
 		if(entity instanceof EntityLivingBase && ((EntityLivingBase)entity).isInvisible()
-				&& !entity.getEntityData().getBoolean(Petrify.NBT_KEY))
+				&& !entity.getEntityData().getBoolean(BlockStatue.NBT_KEY))
 			return "ebwizardry:textures/armour/invisible_armour.png";
 
 		if(slot == EntityEquipmentSlot.LEGS)