Is it possible to add reading each ROI Group

[cudmore]

Hi there, great package, easy to use, and it works!

Is there any chance you can add reading of each ROI Group? The 'Group' is set in the ROI manager using the 'properties' dialog.

Thanks

[cudmore]

I added some code to read each ROI group. The main return dictionary now has a 'group' key.

See PR #26.

This modified version works for my saved ROI .zip files. I am currently only using line ROIs.

The Travis CI build fails because of false assertions that compare loaded results (which now have 'group') to hard coded dictionaries and .json structures (that do not have 'group').

Thanks for a neat package!