Binning transformation

[TuomasBorman]

Add "binning" transformation. The transformation is used for instance here

• The binning should be able to done row or column-wise (easy as we use MARGIN)
• All zero values are assigned to bin 0.
• All non-zero values (N number of them) are assigned to B number of bins evenly based on abundance.
  • Sort taxa into descending order
  • Assign N/B most abundant species into bin B
  • Assign the next N/B most abundant species into B-1, and continue the process

@raivo-otus

[raivo-otus]

Seems straightforward enough to implement. I'll add it to my tasks list!