replaced IOMemory store with new implementation based on Python sets#268

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osma wants to merge 2 commits intoRDFLib:masterfrom osma:setstore

+265-384

Commits on Apr 22, 2013

replaced IOMemory store with new implementation based on Python sets
Osma Suominen
committed
fix for Python 2.5 compatibility: avoid set.intersection() with multiple parameters, which was introduced in Python 2.6
Osma Suominen
committed