Feature request: store/load multiple graphs in local storage

[ghost]

This other grapvhiz web editor has the ability to store multiple graphs in the local storage of the browser. Would it be possible to implement something similar?

I prefer Edotor over the other web editor due to the convenient text editor and possibility to export to PNG. However, it would be nice if I could store more graphs in the local storage. Currently I visit the share link and bookmark that, but that's not very scalable.

I think it's related to #13.