Update install.rst
Update install.rst

Ubuntu (specifically the psycopg2 bindings) needs more requirements to compile all dependencies.
Freso/botbot-web,Freso/botbot-web,metabrainz/botbot-web,reidwooten99/botbot-web,metabrainz/botbot-web,metabrainz/botbot-web,reidwooten99/botbot-web,reidwooten99/botbot-web,Freso/botbot-web