Prevent parsing failing on some log files.

For both old and new log files, we now also search the parent directory for
the log file.
For pipeline, OMERO_channels can be specified explicitly.

To ensure INFO logs are printed to the screen.

Data now passed with x and y in the correct order;
References to session removed from BabyParameters

Read the order of the channels from OMERO and impose this order
on tiler to prevent Brightfield being misidentified.

babywriter's overwrite variable must be a list.

Multiprocesssing now uses the standard pathos syntax and automatically
assigns the number of cores available on a machine.

session is not used by tensorflow 2.

Some functionality lost, but the original is fullpipeline.py.

For buds with two mothers, we discard the second predicted mother.

validate_lineage returns the corrected lineage, with any extra
mother-bud assignments discarded.

Its checks for duplicated mothers became redundant and were deleted.

find_channels_per_position compares dataframe with None to check data exists

Version is stored in aliby/version.py, as well as independently in pyproject.toml.