add --xt-empty. resolves #274

updated lib and xt.database
fixed some small logic errors xt.databse
0.9.40
fixed worldlogin bug
attempt to deactivate nvm
0.9.41
also create empty and quickstart databases in ci

- tightened up 'engines' field in pkgjson
- disable 32bit cpu support
0.9.42
updated lib (added -e for foundation builds)
removed build cmd log statements
Merge pull request #286 from tjwebb/issues/274

Issues/274