Fixed a wrong import
Merge pull request #1549 from gem/merge-nrmllib

Removed the dependency from nrmllib
Update README.me with new oq-engine command
Replace references to nrmllib in packager.sh
Fix oq-engine command name in output list
Merge pull request #1553 from gem/fix-list-command

Fix oq-engine command name in output list
Merge branch 'master' of github.com:gem/oq-engine into single-getter