Add toolinfo.json
Add toolinfo.json

De facto standard to make the tool indexable by directories like
https://tools.wmflabs.org/hay/directory/

jhsoby/citationhunt,jhsoby/citationhunt,jhsoby/citationhunt,Stryn/citationhunt,jhsoby/citationhunt,Stryn/citationhunt,Stryn/citationhunt,Stryn/citationhunt