Add sound/show action (FIXME: need tests!)

app/controllers/api/sounds_controller.rb

@@ -0,0 +1,7 @@
+class Api::SoundsController < Api::ApplicationController
+  # FIXME: add some tests!
+  def show
+    sound = Sound.find params[:id]
+    send_file sound.path, :type => sound.mime_type
+  end
+end