python-twitter isn't compatible with google app engine #44

python-twitter uses local files (tempfile.gettempdir) for caching purposes.
due to the file access restriction in google app engine this library isn't compatible and can't be run in gae.

please find the restriction here: https://developers.google.com/appengine/docs/python/runtime#Pure_Python

I'd like to open a new branch which is gae-friendly. the idea is to re-implement the cache mechanism based on tempfile.TemporaryFile and prefixes. other issues with gaw might happen as well and to be treated in that branch.

before I do so, I'd like to have your opinion first please.

thanks in advance
Akiva