add c-shaped rh profiles
I thought it would be nice to add the c-shaped RH profiles into the library. This is something I hope @m300575 would have code for, and could either add, or send to me for me to add. I would fix the c-shapes based on the moist adiabats, i.e., at the lcl, at the freezing level, and at the minimum maximum pressure of points with the minimum temperature