Developed Simpler Approach to Isolating Calls

Any local score >= some threshold is automatically set to a bird call. Will continue as long as there are multiple scores in a row above the threshold. To display, required me to create two new functions that server the purpose of visualization as well as calculating the scores over a folder of wav files. This is a horrendous solution creating two new functions, so I have to go back and rework calc_local_scores() and local_score_visualization() to support different types of isolation. This is something that should be done when I rework Isolate for gradient descent.