Alternate operator#15

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rodrigomanhaes wants to merge 3 commits intonsi-iff:masterfrom

rodrigomanhaes:alternate-operator

Commits on Feb 18, 2011

added support to an alternate operator - div, as an option for objects that override __or__
rodrigomanhaes
committed
alternate operator works only for those objects that really need it
rodrigomanhaes
committed
added some textual explanation to alternate operator doctests
rodrigomanhaes
committed