Using NetBeans as IDE, added appropriate files

Have working AudioFile class

Issue #1
Close #1
adding classes Index, MusicLibrary & Preferences

Added these classes for the next step of the project. Implement indexes.
classes all speaking to each other

ready to create indexes

Issue #2
Index iterates through path recusively

Index recursively goes through path recursively to check all files into
the future bs/rb tree. BST and Node are both templatized for future
use.

Issue #2
Added ide specifics to gitignore

Issue #5