Hide meta methods

Consider hiding the meta methods.
Maybe something like this..
```
local Object   = {}
local Meta     =
{
	__call  = function(self, ...)
		local obj = setmetatable({}, self)
		obj:new(...)
		return obj
	end,
	
	__tostring = function(self)
	  return "Object"
	end,
	
	__index = Object
}
setmetatable(Object, Meta)
```