Message 103787 - Python tracker

Stealing from Tennessee...

Patch committed to py3k in r80290, r80291, with some minor tweaks and fixes:

 - rename delta_remailder to delta_remainder
 - fix memory leak in delta_remainder
 - add whatsnew entry for docs
 - note that timedelta // timedelta returns an integer in docs
 - add tests for raising ZeroDivisionError, and remove uses of
   lambda in favour of using the operator module

Thanks, Alexander!