Write up acceptance spec for image/show
Ensure 403 forbidden is thrown when trying to edit another person's image
Test bad params for Images controller PUT update
Change wording
Whitelist description param
Test that show template is rendered after 403
Test redirect to login when editing image as logged out user
Add auth filter to edit action
Move tests to acceptance
Implement tests
Update description of test
Redirect to image/show if editing another person's image
Add auth checks when editing images
Test against new auth checks
Do not show edit link if you don't have permission to edit