CHANGE: takes out the 'extract' alias/script' hoping it takes less to source the '.bash_aliases' file
IMPROVE: better 'git tree' and cleaned the file so it looks prettier ;D
ADD: extract script called by an alias
ADD: script for converting '*.wav' files into '*.mp3' format

Takes al wav files in the current directory, converts it and places them in a folder called 'converted_to_mp3/'