Music keeps being redownloaded

[Starfox64]

There is a specific music in my SoundCloud library that gets downloaded everytime I run soundscrape on my liked tracks.

Here is the music in question: https://soundcloud.com/ed-harrison/footprint

[gamemasta0]

It appears that that's because it's a .wav file. I've made a pull request that includes code that fixes this problem. Prior to my changes, the code was only checking for <track_name>.mp3 before determining whether or not to download/overwrite a file. I added a check for <track_name>.wav. I've tested on my local copy and the track in question does not redownload with my changes. Here is the pull request I mentioned: #179

[SimplicityGuy]

This issue is addressed in a future PR, after #241 is merged.