EvenStrangest

Solved by including 'stdexcept', as per [[Exception 'out_of_range' not member of std?](https://stackoverflow.com/questions/29607544/exception-out-of-range-not-member-of-std)](https://stackoverflow.com/a/29607575).

Also true for MaterialManager, ScenarioParser and OpenGLRealOcean.

Any updates here? I'm also in need of this, calculating the entropy of a Gaussian mixture model and a logistic mixture model.