Zooming figures export

[will-moore]

Fix and RFE for zooming images when exporting / creating figures.

To test:

• Draw a ROI (rect) on an image and create ROI_Split_Figure in Insight, choosing ROI zoom of E.g. 400%. Check that the ROI zoomed panels are not pixelated.
• Run Batch_Image_Export script, setting the Zoom parameter to E.g. 300%. Should see that all images are 3x their default size and that the zooming is not pixelated.

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--rebased-to #35

[pwalczysko]

Step 1: works as expected.
Step 2 (Batch_Image_Export script): Error after change of zoom - see workflow below

• import test_images_good/andor/
• select the Dataset Andor
• go Scripts > Batch_Image_Export
• Set the Zoom to 300%
• the action window reports successful completion
• click onto the Batch_image_export.zip link
• in the menu, there is Error (see below)
• repeat Batch_image_Export, this time setting zoom to 100% (default)
• this time, the Batch_image_Export.zip menu in Activities has no Error in it
• run the Batch_image_Export again, again with 300% -> Error is there again

Error:

/usr/lib/python2.6/dist-packages/PIL/Image.py:1298: DeprecationWarning: integer argument expected, got float
  im = self.im.stretch(size, resample)

[pwalczysko]

Except for the error (see above) the images created by Batch_Image_Export look as expected, even at 300%.

[atarkowska]

Works for me as expected. No errors for me. Tested both Insight & Web.

[jburel]

--rebased-to #35