better CLI

[rvalyi]

copy this syntax
https://blog.starkandwayne.com/2014/05/10/using-a-postgres-uri-with-psql/
postgres://USERNAME:PASSWORD@babar.elephantsql.com:5432/jszlmeae

if not pwd in uri, then ask (else admin)
use a URI parsing tool?

add options:
-s (secure without port)
-e "some ruby expression" -> eval and return like ruby -e
if only "some expression" -> eval but enter irb instead
-f -> don't load constants (faster)

DB and common methods? -> not sure if not implemented yet in JSONRPC