Rearranged audio files, updated Sound Manager prefab
Slight tweak on City scaling (1.0 from ~1.5)
Renamed Playtest 2 Folder to "Playtest Scenes" to avoid confusion
Completed Tutorial levels 3 and 4 and associated files
Updated build editor settings to be ready to create next playtest build
Merge branch 'master' of https://github.com/kuvick/DOEGame