Add support for timeouts

I added code to support displaying and changing the load balancer timeout (and also fixed a trivial typo in the README file).

I am *NOT* a Python guy, so I haven't a clue how to note in the code that this slightly changes the dependencies. But the code in facdf57 to change the timeout depends on the dev version of the python-cloudlb library, specifically on  https://github.com/rackerlabs/python-cloudlb/commit/6a69e27c50acbbe756eb97f13ecb7b5515be52b9. So I guess this won't be safe to merge in until that version of python-cloudlb is released.