exercise names properly return name
extracted exercise utilities to ExerciseUtils
directory mapper class controls directory locations
extracted directory logic to directory mapper
gabb::program controls program flow
line break and beat console commands; module Commands -> ConsoleCommands
session_path class method for DirectoryMapper
files properly include ConsoleCommands instead of Commands
session divided into session::base and session::manager
program can create new session and load session
added pry-bloodlines to gemfile
improved title presentation
improved naming throughout