gui: small stream test case fix
Integrated FileInfo into ACquisition Analysis
Fixed canvas rescale asserting bug
gui: second trial at connecting ROI <> repetition

This time is more advanced, after discussion with users (Benjamin & Sander).
The idea is to provide a 3rd, redundant, property: pixel size. In addition,
we ensure that pixels are square.

Still need some fixes, testing.
Merge branch 'master' of vpn.delmic.com:odemis
gui: skeleton work to get changes to the ROI back