Open a save dialog when exporting projects
Add 'add node' and 'add edge' via context menu
Add node/edge deletion on context menu
Stringify label, just to be safe
Fix node label updating
Add edge labels
Add 'set label' via context menu
Add 'set color' via context menu
Add a convenience reporter for edges
Add 'Export to HTML'
Merge pull request #44 from Muon/master

Save dialog, context menus, edge labels, label updating and HTML export