learning_target_show_spec.rb -> concept_show_spec.rb
Must sign in to access content. Also fixed alert background. Bootstrap changed utility class to alert-danger. Fixes #80
Merge pull request #83 from graspapp/authorization

Must sign in to access content. Also fixed alert background. Bootstrap c...
Concept controller now flashing error at appropriate time and not when user is logged in.
Revert "Concept controller now flashing error at appropriate time and not when user is logged in."

This reverts commit 07e06bba37ccbadf9ad73d0296470d1be9bfc167.
"Concept controller now flashing error at appropriate time and not when user is logged in. Fixes #84"
Merge pull request #85 from graspapp/authorization

Authorization
Remove unnecessary SQL in ConceptsController.
Merge branch 'master' of github.com:graspapp/grasp
Merge branch 'master' into concept-columns
Make student unit view match mockup.