Add category error messaging, hide empty ones
Fix display date
Merge pull request #26 from FormidableLabs/feature-no-result-messaging

Chore: Add category error messaging, hide empty ones
Merge branch 'master' into feature-review-design

* master:
  Fix display date
  Add category error messaging, hide empty ones
Merge branch 'feature-review-design' of https://github.com/FormidableLabs/jobboard into feature-review-design

* 'feature-review-design' of https://github.com/FormidableLabs/jobboard:
  Transfer @alexlande's styles to other review pages
  Remove extraneous view
Add flexbox for post columns