Finalized apso.py

Generalized Accelerated Particle Swarm Optimization Module
-APSO allows for optimization of bound-constrained problems

Code is built from Xin-She Yang, "Nature-Inspired Metaheuristic
Algorithms",
Second Edition, Luniver Press, (2010).   www.luniver.com

Nelson, J. (2014)
jn2345@hawaii.edu
Added matplotlib animated visualization

It's freakin awesome. Watch it