Looking up a class property will now search the parent class properties
if parent exists
Classes have a few more built in properties:
* __name holds the name of the class as it was defined as a string
* __base holds the instance metatable as it was defined (not dynamic)
* __parent holds the class's parent class if it exists (not dynamic)
The way class inheritance is handled was CHANGED (uses __base instead of
looking at __index of parents metatable). Make sure you recompile all
your code if using class inheritance because old classes won't work with
new ones.
