Modify User Dashboard to Show Own Listings

* Shows data of each listing
* Allow user to edit listing
Created a listing partial for dashboard/listing
Style error states and adjust reponsive breakpoints for login form.
Merge pull request #11 from Metis-AAE/ah-styles

Style error states and adjust reponsive breakpoints for login form.
add delete to listing show
Merge pull request #10 from Metis-AAE/edit_dashboard

Modify User Dashboard to Show Own Listings
change method delete to destroy
Merge pull request #12 from Metis-AAE/az-delete_listing

add delete to listing show
Turn Thumbnails into Links
Merge pull request #13 from Metis-AAE/images-to-links

Turn Thumbnails into Links
add user show page