Use pyramid_redis with socket

I found this client very handy but missed an option for usage with unix sockets. My ISP only provides a redis via socket. I actually ended up in rewriting some code (mainly in hooks.py), since I did not want to do a quick hack. The main problem was, that I could not just make a difference between URL and socket, since the socket option in the StrictClient results in an object with a different connection pool type. Hope you like it. Let me know, if I messed something up or if it doesn't meet your standards. I think/hope, I did not break anything.