Critical Description
The "lineage" link available next to process instance doesn't show the graph when it's clicked. Instead it displays error message.
The reason is that the html5-ui/js/falcon-lineage.js file sends requests to
var PREFIX = '/api/graphs/lineage';
while the expected prefix is /api/metadata/lineage.
I will send a patch soon (this is "one-liner").
Btw, the lineage feature is really nice!