Bugfix for wrong offset if object is cloned. Same bug as issue #416
Merge pull request #421 from Kienz/offsetProblem

Bugfix for wrong offset for cloned objects (polygon & polyline)
Add backgroundColor to svg output
Add backgroundColorPattern to svg output
Bugfix backgroundImage in sag output - width/height are depend on backgroundImageStretch
Bugfix in setBackgroundColor - rename pattern to repeat
Merge branch 'svgoutput' into sketch