Mistake in multipoint
Rearranged code into two classes

- we now have Bioformats and Bioformats3D.
Bioformats works as a raw interface, reading out images at location
(imageinex, planeindex)

Bioformats3D wraps Bioformats, adding functionality for reading out full
z stack and selected channel at certain t indices

- got rid of nd2 workarounds
(I will make them available in separate branch)