Retract during printing of the raft. As requested.
Add obj finish command trough gui socket.
Fix huge offset moves in dual-extrusion print.
Only make inner skirt lines when the skirt is attached to the object.
Fix https://github.com/daid/Cura/issues/738
Expand the raft around the support and wipe tower.
Force the skirt to printed outside in.
Merge branch 'master' into BFB