Replace Achievements with Advancements

- Advancements are now in JSON files, converted by the included migration script.
- WizardryAdvancementTrigger is a generic achievement trigger that can be reused throughout the code to trigger custom advancements not covered by the JSON conditions.
- Plus some other small and obvious fixes.

src/main/java/electroblob/wizardry/spell/ArcaneJammer.java

@@ -8,6 +8,7 @@ import electroblob.wizardry.constants.SpellType;
 import electroblob.wizardry.constants.Tier;
 import electroblob.wizardry.entity.living.EntityWizard;
 import electroblob.wizardry.event.SpellCastEvent;
+import electroblob.wizardry.registry.WizardryAdvancementTriggers;
 import electroblob.wizardry.registry.WizardryItems;
 import electroblob.wizardry.registry.WizardryPotions;
 import electroblob.wizardry.registry.WizardrySounds;
@@ -44,7 +45,7 @@ public class ArcaneJammer extends Spell {
 		if(rayTrace != null && rayTrace.typeOfHit == RayTraceResult.Type.ENTITY && WizardryUtilities.isLiving(rayTrace.entityHit)){
 
 			EntityLivingBase entity = (EntityLivingBase)rayTrace.entityHit;
-			if(entity instanceof EntityWizard) { AdvancementHelper.grantAdvancement(caster, EnumAdvancement.jam_wizard); }
+			if(entity instanceof EntityWizard) WizardryAdvancementTriggers.jam_wizard.triggerFor(caster);
 
 			if(!world.isRemote){
 				entity.addPotionEffect(new PotionEffect(WizardryPotions.arcane_jammer,