Graph tool similar to Juju-GUI using D3.js

The idea is to be able to add/delete nodes and connect/disconnect them.
Folders 1.{...} through 4{...} were the intermediate steps till the final result (5) as I was trying to find my way on how to use d3.js.
If you want to serve it with a tiny web server and Go is available on your system you can use the server.go file. Run it with:
```
 go run server.go
```

Functionality:

add nodes by clicking on the left
connect 2 nodes A-B by clicking A's 🔗 icon and dragging the line to B's 🔗 icon
select a node or a line by clicking on it (the dashed outline means it is selected)
delete a node or a line by first selecting it and then by clicking the delete button
zoom in/out by using the scroll wheel
pan by clicking/dragging on the canvas

Screenshots

Update May 2018, the same with vis.js

More or less similar functionality (zoom in/out, panning, add/remove/edit nodes and links) by using vis.js
You can find it inside the vis.js folder