Iterative blur transformation

[Artsiom Komar]

Currently, BlurTransformationPlugin allows only radius == 25 and only 1 iteration. But there are many cases when an image should be blurred more than once (be more blurry).

[Jaewoong Eum]

Hey @TemMax, in version 2.1.4, you can set the radius from 0 to Int.MAX_VALUE. Thanks for reporting nice issues!