OEBitVector OEBitVectorOr(const OEBitVector &a,
const OEBitVector &b)
The OEBitVectorOr function returns the Boolean disjunction (or `or')
of two OEBitVectors. The result will have the same number of
bits as the larger of the two operands. This function is identical
to the '|' operator of two OEBitVectors.