C++ Wrapers around python's matplotlib

Embeds the python interpreter, so it's heavy handed. Usefull if plots have to be generated as part of a build process. It's based on matplotlib-cpp.

Differences:

• This one is not header-only, Cmake scripts are provided
• This one uses pybind11, to reduce the amount of plumbing code.
• This one has an explicit object to keep the livetime of the python interpreter.

Minimal example:

#include <matplotlib.h>

int main()
{
    Eigen::ArrayXd x = Eigen::ArrayXd::LinSpaced(20, 0, 4);
    Eigen::ArrayXd y = x.sin();

    MatplotLib p;
	p.figure();
	p.plot(x, y);
}