fix for if someone goes to /users/:id instead of /:username for some reason
made username not case sensitive, not sure why the flash message isnt showing up
made alert message instead of flash
turned on class_caching in dev because it gives an error otherwise
removed empty lines
Merge pull request #150 from omahacodeschool/usernames-fix

fix for if someone goes to /users/:id instead of /:username for some reason