nodejs+postgresql backend
PG: don't try to commit after rolling back
typo fix
retrieve header as a string to avoid restringification
make `npm start` show pretty logs
postgresql-based clipperz own session store

the use thereof is not mandatory, but may come in handy for the
standalone deployment
PG: also tracelog error (if any)
builder: moved temp folder adjustements where it belongs

it wasn't meant to be in the script language builder, but only should've
affected node  backend
when copying node backend files skip htdocs and node_modules

both are used while debugging and don't have to break the build
switched postgresql schema from json type to plaintext
more tracelogging
frontend: turn off autocompletion for input elements in record

otherwise the very presence of saved form values for the same host may
(at least in some browsers) ruin the record if it was edited and
carelessly saved.
turn off autocompletion for change passphrase form
Merge remote-tracking branch 'github/master'