Cleaned up convert shell arguments
New algorithm for calculation of croppping area. fixes #10 - distorted
images with AOI-Cropping.
Changed order in which events are fired when processes end so that
requests can be finished faster.
Fixes for new AoiCropping algorithm. fixes #10
Fixes for new AoiCropping
Version bump 1.4.1
also moved to more recent versions of dependencies
Merge tag '1.4.1'

Tagged 1.4.1