Added AubioBeatTracking.
It's nearly interchangeable with Trents Beat Tracking.
AubioBeatDetector should now be interchangeable with BeatDetector.
Also created 2 test hats which display the output of AubioBeatDetector and BeaterDetector
Got the aubio beat detection library working as expected (does not handle live audio well but is good at files)
Made the install script only copy across binary files
Merge branch 'feature/AubioBeatDetection' into develop