add pry to dev & test group
song factory: fix title generation
tests: add route helpers
song#add_to_cache: save title,link to cache since thats all we need right now in song index, test
song#add_to_cache: another test
user#cached_songs: grab songs from cache to display (need to do in batch, not 1 at a time), test
songs#index: use cached_songs not songs, add link to view