Add auto armor equip for kits (#3629)

Adds a config option to have player auto-equip armor from kits.

Also adds a performance improvement for all uses of EnumUtil#getAllMatching by switching it to an EnumSet.

Closes #347, closes #3452.

Essentials/src/main/java/com/earth2me/essentials/Settings.java

@@ -1528,6 +1528,11 @@ public class Settings implements net.ess3.api.ISettings {
         return newSigns;
     }
 
+    @Override
+    public boolean isKitAutoEquip() {
+        return config.getBoolean("kit-auto-equip", false);
+    }
+
     @Override
     public boolean isPastebinCreateKit() {
         return config.getBoolean("pastebin-createkit", false);