apply TLS go all

use new dqlite app pkg

clean up a bit

use contexts globally

check cluster to see if node already exists before trying to add it

remove unused, run go vet / golint

add transfer/assign role capabilities

fix compose behavior

more adjustments

add env vars for configuration, better 'seeker' logging

restructured, fix binding to non-local port

tidied up a bit

clean up

add script to convert postgresql schema to sqlite

remove cruft