organize js for easier expansion

[sambrenner]

i was going to work on #14 but thought it might make sense to start breaking out some of the JS so we don't end up with one massive file full of anonymous functions.

@milovanderlinden do you want to merge some of your JS changes into master so i don't end up breaking your work?

[milovanderlinden]

I do, thank you! I isolated my development into https://github.com/dogodigi/soundboard/tree/2.0 maybe it would be good if you would test the 2.0 branch once to see what is there and what needs to be added?

[milovanderlinden]

I am going to slow merge. I will first update soundboard.js and the routes/index.js to use data- elements instead of rely on the name of the sound file. This is needed to make way for track-lenght and nicer titles.