Edit Gallery name and adding update buttons

Added a lot of functionality today. Added an edit gallery option to each gallery which redirects to a new page with a form that allows the name of the gallery to be updated.

Also added a button on the show.erb page which deletes the gallery entirely.  It then re-directs to the index where you can see the gallery is no longer displayed.
Added edit images feature to app.rb

Created a new page to add a new images to a gallery.  This meant I had to created a new html page just to handle new requests. I also had to crate a form within that html view page with an embeded form.  The form passed the key value pair of image and image url.  Then I created a new route in app.rb to handle the post request.  It took the hash of the user params and merged with another hash of the gallery_id and params(gallery_id).
Add image upload feature

Create image upload feature to take in a url from params and assign it to an image from a specific gallery.