Matrixscreener

- readme on pypi, because...

- receive will wait until timeout for command

- explicit disable
- debug in cam-module

- require fijibin>=0.0.3

- do compression and stitching with multiprocessing
- move imagej submodule to fijibin

- fix new image filename format (four characters for some attributes)
- use absolute paths for slides, wells, etc
- escape paths in imagej macro