Blender Git Loki

BGE : Standardization of callbacks execution.

A new function (RunPythonCallBackList) to call all python functions
contained in a python list was developed.

This function has:
- first argument is the python list of callbacks
- second argument is a python list of arguments
- third argument is the minimum quantity of arguments
- forth argument is the maximum quantity of arguments

It improves flexibility and supports *args.

Reviewers: moguri, dfelinto, campbellbarton, sybren

Reviewed By: campbellbarton, sybren

Subscribers: sybren

Projects: #game_engine

Differential Revision: https://developer.blender.org/D1102