Speaker makes the system call to make espeak talk using default settings
I think the only thing I changed was comments.
PlayList reads in tracks from directory and returns their names
Added tracks folder to exclusion list
Added getTrack method. Returns track name corresponding to given number.
Renamed "forward" to "next", wrote next and back methods.
Fixed a small issue with acquiring the filepath
Abstract the system calls required to play mp3s using mpg123 into its own class
Added functionality to stop playing a song. Also only plays one song at a time
Tests for Mpg123Proxy
Added rules for building tests and the Mpg123Proxy
Renamed to PlayManager to more accurately reflect the class's role.

Added reference to Mpg123Proxy and removed all system call code.
Optimized next and back bounds checking.
Fixed issue where javac wasnt looking in the right spot for source files
Fixed off-by-one array accessing issue for track names