cleanup hide/show of ui elements relevant to owner vs other user
removed drag to reorder and swipe to dismiss (one of them was interfering with the media recycler view, plus I don't think we have time to fully implement the drag to reorder items functionality)
added swipe layout library to reveal icons underneath (left: delete, right: place detail, add note, add photo, photo gallery)
only enabled for logged in user's trips, if viewing another user's trip, swipe to reveal is disabled
updated media fragment to hide editing features for non-owner user.
added internal user rating bar (unfortunately, vector drawables for custom rating bar is not supported and it doesn't scale the drawables. that's why the hearts are fuzzy)
Issue #81
Here's a screenshot with the menu's revealed: