Added arbitrary coefficients in boundaries (to C++ and Python) + cleaned up CohomologyPersistence.add overloading in Python
#ifndef __NUMBER_TRAITS_H__
#define __NUMBER_TRAITS_H__
template<class NumberType_>
class number_traits
{
public:
typedef NumberType_ NumberType;
static NumberType& normalize(NumberType& n) { return n; }
};
#endif