New graph source. You can point to a public file as source for the gravizo. Also can include multiple sources in the same file, allowing to add multiple graphs in same README.md without escape characters and compatible with Github and Bitbucket.
Use Gravizo is very easy, only need to call the url https://g.gravizo.com/svg? followed by your graph description in DOT, PlantUML or UMLGraph syntax. Indirect
Use https://g.gravizo.com/source/svg?<source_url_url_encoded>. Gravizo will look at source_url_url_encode for a source graph.