A User can edit a profile

* The ability to edit a profile exists
* There does not exist a link to edit a profile anywhere
* Can manually enter link to "/user/:id/edit"
make checkmark on listing show page
delete ;
delete parentheses
Add commit stragglers
put default: false to listing columns
refactor ApplicationHelper
make constant values
refactor
Merge pull request #17 from Metis-AAE/profile-edit

A User can edit a profile
Merge pull request #18 from Metis-AAE/az-amenities

make checkmark on listing show page
A new listing will return to previous page
Takes user back to page when editing a listing

* Modify listing update action to redirect to the previous page
Delete listing function takes you back to dashboard
After a User Logs in, you're returned to your previous page

* A new listing directs you to the show page
* An updated listing directs you to the show page
* A deleted listing directs you to the dashboard
Refactored to be beautiful

* Deleted much code
* Works beautifully
Fix delete from dashboard

* Redirects to root_path after deleting a post
Refactor to ease understanding

* Rename `keep_link_back_url` to `now set_back_url`
* Remove `keep_link_back_url` from `listings_controller`
* Rename `:link_back` to `:back_link`
A new user is redirected to previous page