LUN-1302: Image cropping - make the image refresh work in IE9 + check that the image can be loaded by PIL
LUN-1302: Treat image inside browser cache: load the image at each image src change
LUN-1302: small correction to the image src unique suffix
Merge pull request #10 from pbs/LUN-1302

LUN-1302: Image cropping - make the image refresh work in IE9