Adding lua scripts

Package/Environment/Common/lua/Event.lua

@@ -0,0 +1,32 @@
+local Event = {}
+Event.__index = Event
+
+function Event.new()
+  local instance = {  
+    events = {}
+  }
+
+  setmetatable(instance, EventManager)
+
+  return instance
+end
+
+function Event:register(event, cbself, callback)
+    local listeners = self.events[event]
+    if listeners ~= nil then
+        listeners[#listeners + 1] = callback
+    else
+        self.events[event] = {{cb=callback, s=cbself}}
+    end
+end
+
+function Event:trigger(event, ...)
+    local listeners = self.events[event]
+    if listeners ~= nil then
+        for i = 1, #listeners do
+            listeners[i].cb(listeners[i].s, ...)
+        end
+    end
+end
+
+return Event