Indent facets for ontology fields based on lineage

[cmungall]

Inspired by:

For class detail pages, for facets like "annotation", rather than a flat list ordered descending by annotation count, it would be good to (1) indent the list of terms according to their inter-relationships and (2) remove terms not in the current lineage ( see GO-688 )

I believe we previously thought this required Solr4 (sorry if this is a dupe)

However, I don't think this is required. Everything should be there in the transitivity graph used to construct the inferred tree view.

[cmungall]

Example:

http://amigo.geneontology.org/amigo/term/GO:0003682

This:

Should look like this:

http://amigo.geneontology.org/amigo/term/GO:0003682#display-lineage-tab

(or at least have some kind of indentation approximating this; relation symbols not required)

At first this may seem like less useful, as we only pre-compute one level down. But in fact this is fine, users can drill down if they need to

[cmungall]

(without BFO of course)

[kltm]

Actually, mostly a dupe of kltm/bbop-js#30.