Deprecating functions

[Jan Stolarek]

> I agree. You'll get rid of the redundancy in the library by removing it but
> you're users will have to live with (...)
That's why I want to deprecate them first and give users one release cycle to switch to new 
functions. I assumed that's enough but we could make this two or three release cycles. The reall 
question is how to remember that we should remove this at some point?

Janek