added validation to users, added game and madlibris game models with some validations
incorprated AASM into game model
validatons added to games and user to control for singe and multiplayer games, prevent users from appearing in a game more than once
book, first line, line_choice models and associations esablished
ability to fetch an epub file from project gutenberg added (requires the gutenberg source catalog)
adding back gutenberg catalog
reader to load and search epub files created