ran 2to3 and used latest compat module which is python3 compatible

Hi - I've tidied the code to allow it to be run on RB3 - 

i.e. you still need to update the plugin Loader to be python3 to make it run in RB3 ... probably should be via a install.sh change

I've tested this on both RB3.0.1 on Saucy (ubuntu 13.10) as well as RB2.96 (Ubuntu 12.04) and it works as before.