Enable Single Node Editor Plugin. Close #157.
Set default username at 'new' command. Close #156.
Updated README.md Ref #118
Added images for Readme. Ref #118
Merge branch 'master' into collaboration
Update README.md Ref #118
Impl PictgramPanel.GetNodeViewFromUID. Ref #154.
Merge branch 'master' into collaboration
show warning message to clients who try to edit a node which is currently being edited by other