PuDB's post_mortem is now consistant with pdb (https://github.com/inducer/pudb/pull/71)
Give all the necessary traceback info when using PuDB
Don't require distribute in setup.py

It isn't actually required to install (it's only needed if you want to
setup.py develop).

Fixes #269.
Added `hub pull-request` info to CONTRIBUTING.md
hub is no requirement
Add myself to AUTHORS
Merge pull request #273 from asmeurer/pudb

Pudb
Merge pull request #276 from asmeurer/nosetuptools

Nosetuptools