fix ubuntu install

- 'apt-package.txt' typo that made it not work at all
- reorganize apt-packages.txt to install nodejs correctly
label metrics with percent
Merge pull request #3129 from dimagi/ubuntu-install

fix ubuntu install
use couchdbkit==0.6.5.5
Merge branch 'daily_form' into autostaging
Merge branch 'vellum-includes' into autostaging
Merge branch 'cloudcare-resume' into autostaging
Merge branch 'multimedia-case-properties' into autostaging
Merge remote-tracking branch 'origin/sql-dailyformstats' into autostaging
Merge remote-tracking branch 'origin/opmMaps' into autostaging
Merge branch 'jsonobject-couchdbkit-version' into autostaging
update submodule refs