Updating default node-ID for synthetic tree view (temporary)
Added supporting study information to edge properties...

... including DOI-to-URL, with lookup at dx.doi.org
Reversing earlier change to default synethetic-tree node ID.
Improved display of supporting studies for an edge.
Adding support for Extract Subtree on nodes without ottol IDs.
Improved reference display. Building missing node names.
Making blocked node-or-taxon-URLs safe for web2py

Replaced "dangerous" characters [:()] with safer dashes.
Adding properties display for one or more node source trees
Merge pull request #19 from OpenTreeOfLife/provenance-display

Improved provenance (properties) display