Fix wrong positioned bounding box of fabric.Polygon and fabric.Polyline objects
- Substract minX and minY from points.x/points.y (_calcDimensions)
- Same in fromElement - but only if minX or minY is negative
Merge pull request #643 from Kienz/patch-1

Fix wrong positioned bounding box of `fabric.Polygon` and `fabric.Polyline` objects
Fix unit tests
Build distribution
Merge remote-tracking branch 'origins/master' into parseSVGOpacity