Thanks to the people listed here for their patches!

Thomas Bohmbach, Jr
    - GAE fixes
Mark Lango  
    - Ignore key arguments with value of None
Pascal Jürgens
    - Streaming API fixes
Fredrik Lundh
    - html unescape (http://effbot.org/zone/re-sub.htm#unescape-html)
Kumar Appaiah
    - tweepyshell patch
	- sphinx documentation
Ferenc Szalai
	- Fix API.retweet()
    - Add secure option to OAuthHandler
Bas Westerbaan
    - Fixes to API and User model
