[Feature request] dynamically create&edit networks. adding nodes and edges

[drahnreb]

Would really appreciate the ability to add elements (nodes and edges) dynamically via a context menu #58, select&connect (for edges) or even by drag&drop.

Cytoscape seems to support this in principle: http://manual.cytoscape.org/en/stable/Creating_Networks.html#adding-a-node

[junebug-junie]

any luck @drahnreb? I did some convoluted solution... Would love to see improvements.