Add and wire up skill specific xp formula multipliers

src/main/java/com/gmail/nossr50/config/experience/ExperienceConfig.java

@@ -127,13 +127,6 @@ public class ExperienceConfig extends ConfigValidated {
         config.set(EXPERIENCE_FORMULA, MULTIPLIER, GLOBAL, value);
     }*/
 
-    /* PVP modifier */
-
-    /* Skill modifiers */
-    public double getFormulaSkillModifier(PrimarySkillType skill) {
-        return getDoubleValue(EXPERIENCE_FORMULA, MODIFIER, StringUtils.getCapitalized(skill.toString()));
-    }
-
     /* Custom XP perk */
     public double getCustomXpPerkBoost() {
         return getDoubleValue(EXPERIENCE_FORMULA, CUSTOM_XP_PERK, BOOST);

src/main/java/com/gmail/nossr50/config/hocon/playerleveling/ConfigExperienceFormula.java

@@ -1,13 +1,28 @@
 package com.gmail.nossr50.config.hocon.playerleveling;
 
 import com.gmail.nossr50.datatypes.experience.FormulaType;
+import com.gmail.nossr50.datatypes.skills.PrimarySkillType;
 import ninja.leaping.configurate.objectmapping.Setting;
 import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 
+import java.util.HashMap;
+
 @ConfigSerializable
 public class ConfigExperienceFormula {
 
     public static final boolean CUMULATIVE_CURVE_DEFAULT = false;
+    private static final HashMap<PrimarySkillType, Double> SKILL_FORMULA_MODIFIER_DEFAULT;
+
+    static {
+        SKILL_FORMULA_MODIFIER_DEFAULT = new HashMap<>();
+        for(PrimarySkillType primarySkillType : PrimarySkillType.values())
+        {
+            if(primarySkillType.isChildSkill())
+                continue;
+
+            SKILL_FORMULA_MODIFIER_DEFAULT.put(primarySkillType, 1.0D);
+        }
+    }
 
     @Setting(value = "Player-XP-Formula-Type", comment = "Determines which formula is used to determine XP needed to level" +
             "\nDefault value: LINEAR")
@@ -26,10 +41,18 @@ public class ConfigExperienceFormula {
             "\nDefault value: " + CUMULATIVE_CURVE_DEFAULT)
     private boolean cumulativeCurveEnabled = CUMULATIVE_CURVE_DEFAULT;
 
+    @Setting(value = "Skill-Formula-Multipliers", comment = "The end result of how much XP is needed to level is determined by multiplying against this value" +
+            "\nHigher values will make skills take longer to level, lower values will decrease time to level instead.")
+    private HashMap<PrimarySkillType, Double> skillXpModifier = SKILL_FORMULA_MODIFIER_DEFAULT;
+
     public FormulaType getFormulaType() {
         return formulaType;
     }
 
+    public double getSkillXpFormulaModifier(PrimarySkillType primarySkillType) {
+        return skillXpModifier.get(primarySkillType);
+    }
+
     public ConfigExperienceFormulaLinear getConfigExperienceFormulaLinear() {
         return configExperienceFormulaLinear;
     }

src/main/java/com/gmail/nossr50/config/hocon/playerleveling/ConfigLeveling.java

@@ -31,6 +31,14 @@ public class ConfigLeveling {
      * GETTER BOILERPLATE
      */
 
+    public double getSkillXpFormulaModifier(PrimarySkillType primarySkillType) {
+        return getConfigExperienceFormula().getSkillXpFormulaModifier(primarySkillType);
+    }
+
+    public boolean isCumulativeCurveEnabled() {
+        return getConfigExperienceFormula().isCumulativeCurveEnabled();
+    }
+
     public double getEarlyGameBoostMultiplier() {
         return earlyGameBoost.getEarlyGameBoostMultiplier();
     }

src/main/java/com/gmail/nossr50/datatypes/skills/PrimarySkillType.java

@@ -217,7 +217,7 @@ public enum PrimarySkillType {
     }
 
     public double getXpModifier() {
-        return ExperienceConfig.getInstance().getFormulaSkillModifier(this);
+        return mcMMO.getConfigManager().getConfigLeveling().getSkillXpFormulaModifier(this);
     }
 
     // TODO: This is a little "hacky", we probably need to add something to distinguish child skills in the enum, or to use another enum for them