adds nested comments
adds allvote action to photos controller
adds new comment save feature
updates top level comment rendering
adds user model/collection
adds collapse button functionality
fixes nested comment collapse bug
adds comment reply feature
updates nested comments; still need to fix replying to children comments
updates header to show current username
finishes upvote downvote feature
adds favorite model/collections
adds favorite button functionality
fixes new comment creation bug
adds map to photo show page
removes photo map view
updates photo show map
adds navigation functionality
creates region view
fixes favorite bug