MMLC-80 Start of user auth
MMLC-80 add admin user option and make user controller admin only
MMLC-13 fix up data model so that we are ready to submit feedback for specific equation components.
MMLC-13 more clean up for data model
MMLC-13 Add comments to equation
Merge pull request #32 from jbrugge/master

Vagrant isn't ignoring the Azure provider config, so avoid error of missing secrets file.
Merge remote-tracking branch 'upstream/master'
Merge pull request #34 from meghanlarson/master

Changes to data model and start of feedback function.