Implement and upload network examples to github

[salvadord]

• [X] Simple network learns to drive virtual arm via STDP + RL
• [ ] Control of robotic vehicle (real-time interface with VREP robot simulator)
• [x] Evolutionary optimization of network params using Python Inspyred
• [x] Hippocampus CA3 models (Neymotin's and Bezaire's)
• [ ] Thalamocortical oscillations (Knox)
• [ ] Potjans & Diesmann V1 model
• [ ] Traub network

[salvadord]

@barefoothiker - we will see some of this example models in class