add warning when appending arc to polyline with gap
Merge branch 'master' of github.com:qcad/qcad
set relative zero when drawing points

add key code based command
update tool title
minor fixes
update tool title, icon
arc interpolation optionally with tangential lines
add getOrientation to RPolyline
fix typo
update script wrappers
Merge branch 'master' of github.com:qcad/qcad