Extract sign_in controller method, and extracted sessions helpers into StartPoint::ControllerMixins
Remove a semicolon and a dos line ending
Add ApplicationController#authenticate_user! and its specs
Refactor #sign_in method
Begin re-writing users controller specs
Prevent non-admins from deleting users
Add display of errors to edit user form, and fix user role dropdown
Test that admins can update a user role
Fix bug in which a non-admin could update his own role
Merge pull request #2 from AdamKyle/mark

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