Allow deleting site without prompt

ee site delete example.com --all-no-prompt
Removes db, files and nginx config without asking user. 
Useful to remove interactivity when calling from a remote server.
Fixed extra fi

There was one fi too much
Fixed wrong messages

REMOVEFILES() AND REMOVENGINX() had the REMOVEDB() confirmation message
Merge pull request #239 from edwinvandeven/master

Allow deleting site without prompt