Preserve smooth scrolling state even when receiving spurious (0,0) pixelDeltas
Merge pull request #452 from OskarLinde/smooth_scroll

Preserve smooth scrolling state even when receiving spurious (0,0) pixelDeltas
first attempt of interpolating splines
second attempt
Interpolation spline GUI
fixed toolbar logic for spline
fixed some compiler warnings
file cleanup
added copyright
renaming splinepoints files
added middle points
tangent and intersection
added intersection with quadratics
cutting finished
implemented file IO
intersection finished
splinePoints: hide degree from options
Updated translations from pootle server
Merge branch 'master' of https://github.com/LibreCAD/LibreCAD
Updated translations after lupdate