Added therubyracer as development machine had nodejs removed.
Model changes and migrations. Also updated model specs and factories.
Fix in premedication model.
View changes to display opioids.
Added the ruby racer.
Updated subject and specs.
Merge branch 'feature/multiple-opioids' into develop
Merge branch 'develop' into feature/require-two-risk-factors
Fixed adding of errors to subject.
Also validated that provided risk factors are unique.
Factory fixes.
Fixed controller spec failing subject validations.
Updated form to display errors and made risk factor field wider.
Merge branch 'feature/require-two-risk-factors' into develop
Removed everything to do with premedication.