Add image url src to favorites menu partial

On artist add to favorites the image used in the
favorites menu is sent to rails to be saved
in the artist record
Add search_with_faves style for existing users

If user has favorites, the search bar will now decrease in
size and move to the left to accomodate favorites menu
Add image_url_small to favorites controller params

used to save image url to artist record on fav create
Add image fetch and first or create to bulk artist fetch

image_url will now be saved to the artist record when all artists
are fetched from seatgeek to seed database. Records will now not
be destroyed if already exist
Add existing users view functionaility

create favorites partial to render favorites menu
create with_favorites separate view for returning users
remove uneccessary css search_box_left class from index
add logo partial from index - reused in with_favorites view