bbi.stackup doesn't error with intervals of different lengths

[Snehal1894]

I used bbi.stackup fuction with varying intervals and it gave me valid a 2D numpy array without throwing any error, when it mentioned that it works with equal intervals.

[nvictus]

Thanks. I actually dropped this requirement a while ago, but it looks like the docstring wasn't updated to reflect it. Specifically, if the bins= argument is used, the intervals can have any length, since each interval can be rescaled to the same number of bins.

It's actually a feature rather than a bug (e.g. to rescale genes to a standardized length), but maybe there should be some guardrails to prevent this from accidentally happening when one thinks that one's intervals all have the same length.

[nvictus]

Behavior is clarified in the docstring in #28.

[dmitrymyl]

Hello! That's a nice feature of interpolating a signal. Could you please also add this clarification to the repo's Readme? Some users usually refer to that rather than to docstrings.