Changes to building and querying of embeddings

Fix malformed /related query

Update conceptnet5/build.sh to properly reference pip3.

This reverts commit 7fb141fd, reversing
changes made to 705144ce.

Memory consumption

Add Snakefile rule for shuffling edges

fix the credit for Kyoto/Yahoo data

Revise and update the web "filters" code

I don't see a realistic path to having versions of the ConceptNet site
that are localized in other languages, and this code wasn't actually
doing anything except raising an error if you asked for a language
besides English, so might as well clean it up.

Better human-readable labels for disambiguated terms

Now instead of the Web interface showing:
    graph (n/wn/communication)

It will show:
    graph (n, communication)

This is relevant because we now allow disambiguations beyond just the
part of speech to make it to the database. Previously it was always just
"graph (n)" but now we can show more information than that.

Meaningless formatting cleanups

Use PostgreSQL's GIN index and `jsonb_path_ops` to form queries