freesound() function to download and cache freesound WAVs

I'll just leave this here:

    live_loop :loops do
      sample freesound(27130), finish: 0.5
      sample freesound(27128), finish: 0.5
      sleep 8
    end
    
    live_loop :kick do
      sync :loops
      8.times do
        sample freesound(209906)
        sleep 1
      end
    end
    
    live_loop :snare do
      sync :loops
      snare = freesound(26903)
    
      sleep 1
      3.times do
        sample snare
        sleep 2
      end
      sample snare
      sleep 0.8
      sample snare, amp:0.5
    end