I would like to help adding more math functions

[cemremengu]

I would like to contribute more math functions along the lines of python's numexpr lib.

What do you think about this? Where should I begin? Any pointers to getting started with the codebase is appreciated.

[antonmedv]

This is very nice! I think the first thing will be to add some sort of namespace for functions. And add all of those in math.* name space.