Getters for High-Content-Sreening

[Tom-TBT]

Description

The PR implements getters for Screen, Plate, Run, and Well, in the same style as the Project, Dataset, and Image getters.

I implemented tests to cover the new getter functions, for which I modified the generated screen.

There is in addition a new option for get_image_ids, to list images according to a Run ID. This could be a breaking change for anyone who specifies each parameter without their name. (I did that for the sake of consistency for the options order)

Breaking change case, the across_groups parameter was passed without its name:
get_image_ids(conn, None, None, 12, None, False)
This would now return a TypeError('Run ID must be integer') as the False value gets into the run parameter.

Checklist

• Docstrings for all functions
• Unit tests
• Clean style in the spirit of PEP8

For reviewers

• Check that the PR title is short, concise, and will make sense 1 year
  later.
• Check that new functions are imported in corresponding __init__.py.

[erickmartins]

(this is just a message to acknowledge I've seen this and #102 - will get to these as soon as I have some time!

[erickmartins]

picking nits: I think I'd rather have everything be plate_acquisition instead of run - the OME data model object is PlateAcquisition and I'd rather stick to the data model whenever possible!

[Tom-TBT]

I'll write here in case you haven't got a notification, I pushed changes to replace run with plate_acquisition :D

[erickmartins]

Merged - thanks for the patience (and sorry for the communication issues!)