Began implementing possibility to load difference image directly into 2d map as layer, basic functionality there, still tests to be done in aspect to usability for the user
Tests for gradient with css
Updated Difference controller, introduced new process request to get color scale as figure.
Repaired loading wheel which was not centered any more for some reason and added modifier key for bbox selection to allow panning when tool is active by pressing Ctrl key
Added new unit attribute to allow definition of unit in coverage difference creation
Solved problem introduced which does not select corect geometry in download controller
Merged imagelayer features