Remove switch_user

It was not a sensible way to do admin
Search for users and admin links to their certificates
Merge pull request #989 from theodi/feature-administer-users

Admin access users certificates
Precompile admin.js in production
Use published certificate if no id provided
Don’t rely on implicit params to generate form urls
Link to most recent certificate in all embed/badge links
Link to latest certificate url in all locations
Link to certificate in json format from dataset json view
Link to latest certificate if it’s the latest
Can’t find any evidence of this being used