Gravatar image shown on user profile page

Created user show page. Gravatar image is displayed for current signed in user, based on their registered email address.

Tests need to be able to sing in a user, currently fail because of that issue, also, errors are thrown in a test environment in the controller when the controller tries to find the user object by id of user signed in, but there is no user signed in.
There are no links going to the user show page, it currently can only be reached by typing in the url, users/show