Adolc forward module

This module provides support for adolc's adouble type in forward mode. ADOL-C is a C++ automatic differentiation library, see https://projects.coin-or.org/ADOL-C for more information. It mainly consists in:

• a struct Eigen::NumTraits<adtl::adouble> specialization
• overloads of internal::* math function for adtl::adouble type.

Note that the maximal number of directions is controlled by the preprocessor token NUMBER_DIRECTIONS. The default is 2.

#include <contrib/Eigen/AdolcForward>