fix serval-client call in app controller to work with multi-key
set app signing key on first boot
Merge branch 'master' into serval-multi-key
fix parsing of return value from serval-client, in SMK page
Merge branch 'master' into serval-multi-key
Merge pull request #395 from opentechinstitute/serval-multi-key

fix serval-client call in app controller to work with multi-key