Minor Update v2.5.5.

- Added parameters to accept upper case file extensions, such as WAV or
Wav
- Fixed music browse command
- Allowed music browse to accept both name and number of songs, i.e
input 1 for song 1 or input name of song 1 to play.
- Improved Tutorial world to show off new features.
- Added Null Checks to foreach loops
- Added Explored bool to room class
- Add Draw map function to draw local area that has been explored.