remove colon syntax from oop

sim/wire.lua

@@ -1,8 +1,9 @@
+
 Wire = {
 	logictype = 0
 }
 
-function Wire:new(objref, layer, bounds)
+function Wire.new(self, objref, layer, bounds)
 	local o = {
 		objref = objref,
 		layer = layer,
@@ -14,14 +15,14 @@ function Wire:new(objref, layer, bounds)
 	return o
 end
 
-function Wire:setlayer(layer)
+function Wire.setlayer(self, layer)
 	if self.group ~= nil then
-		self.group:removewire(self)
+		Group.removewire(self.group, self)
 	end
 	self.layer = layer
-	sim:connectwire(self)
+	Simulation.connectwire(sim, self)
 end
 
-function Wire:update()
+function Wire.update(self)
 	client:send("WU\t" .. bool_to_int[self.group.state] .. "\t" .. self.objref .. "\n")
 end