message: Add warning if time is scheduled in the past
diff: @@ -178,7 +178,7 @@ define(["Test", "Tone/core/Tone", "helper/PassAudio", "Tone/source/Oscillator",
  });
  - context("Tone.setContext", function(){
  + context("Tone.context", function(){
  it ("can set a new context", function(){
  var origCtx = Tone.context;
  @@ -207,6 +207,19 @@ define(["Test", "Tone/core/Tone", "helper/PassAudio", "Tone/source/Oscillator",
  return ctx.close();
  });
  + it ("tests if the audio context time has passed", function(){
  + // overwrite warn to throw errors
  + var originalWarn = console.warn;
  + console.warn = function(warning){
  + throw new Error(warning);
  + };
  + var currentTime = Tone.context.currentTime;
  + expect(function(){
  + Tone.isPast(currentTime-1);
  + }).to.throw(Error);
  + console.warn = originalWarn;
  + });
  +
  });
  context("Tone.prototype.set / get", function(){
  