Synchronous Evolve function

[Bobingstern]

I'm working on adding reinforcement learning support for this library making use of it's powerful evolution capabilites to dynamically evolve a network through reinforcement learning. In the DQN algorithm, I need to train off a replay buffer and then do things afterwards but currently the evolve function is async so I cannot use it in a sync function without everything exploding. Can you guys add an evolveSync function to get around this?