don't deepcopy options

I'm actually uncertain why you put it in the first place. My only guess would have to do with thread-safety in the case of a `connection_pool` or `connection` option, but aren't those thread safe anyway?

![before](https://f.cloud.github.com/assets/52795/491499/131231b6-ba31-11e2-90b1-e8b69f675741.png)
![after](https://f.cloud.github.com/assets/52795/491500/175a8fd4-ba31-11e2-89cb-294872963734.png)