[Bleeding] Changed event system into a new, much faster design. Huge thanks to @zml2008 & @lahwran.

By: Nathan Adams <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/event/TransitionalCustomEvent.java

@@ -0,0 +1,18 @@
+package org.bukkit.event;
+
+/**
+ * A transitional class to avoid breaking plugins using custom events.
+ */
+@Deprecated
+public class TransitionalCustomEvent extends Event {
+    private static final HandlerList handlers = new HandlerList();
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}