Bugfixes for audio that were not present in Ludum Dare build.

- Footsteps sounds are not playing while player is not walking (quite logic thing if you think about it)
- Music plays since the beginning of the game instead of starting during the level
- Sounds of buttons are present
- Music changes during sprinting
- Fixed option menu to change correct sound layers by sliders
- Tutorial dialogues plays now by Wwise sound engine and not by Unity
- Credits for sound programming are added