Dynamic-pybloom

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Made major corrections to the algorithms for both BloomFilter and
ScalableBloomFilter. Not numerically compatible with serialized
representations of filters from previous versions. Specifically,
BloomFilter was more accurate than requested and ScalableBloomFilter
was much less accurate than requested.

==============
Added copy, intersection and union functions to BloomFilter

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Fixed count in BloomFilter class in the case of union or intersection.
Added DynamicBloomFilter and tests.



changes bellow are for the version ported from