message: updating Draw tests
  now testing correct synchronization with AudioContext.currentTime
diff: -define(["Test", "Tone/core/Draw", "Tone/core/Tone", "helper/Supports"],
  - function (Test, Draw, Tone, Supports) {
  +define(["Test", "Tone/core/Draw", "Tone/core/Tone", "helper/Supports"], function(Test, Draw, Tone, Supports){
  describe("Draw", function(){
  @@ -8,7 +7,7 @@ define(["Test", "Tone/core/Draw", "Tone/core/Tone", "helper/Supports"],
  it("can schedule a callback at a AudioContext time", function(done){
  var scheduledTime = Tone.now() + 0.2;
  Draw.schedule(function(){
  - expect(Tone.now()).to.be.closeTo(scheduledTime, 0.05);
  + expect(Tone.context.currentTime).to.be.closeTo(scheduledTime, 0.05);
  done();
  }, scheduledTime);
  });
  @@ -18,13 +17,13 @@ define(["Test", "Tone/core/Draw", "Tone/core/Tone", "helper/Supports"],
  var firstEvent = Tone.now() + 0.1;
  Draw.schedule(function(){
  callbackCount++;
  - expect(Tone.now()).to.be.closeTo(firstEvent, 0.05);
  + expect(Tone.context.currentTime).to.be.closeTo(firstEvent, 0.05);
  }, firstEvent);
  var thirdEvent = Tone.now() + 0.3;
  Draw.schedule(function(){
  callbackCount++;
  - expect(Tone.now()).to.be.closeTo(thirdEvent, 0.05);
  + expect(Tone.context.currentTime).to.be.closeTo(thirdEvent, 0.05);
  expect(callbackCount).to.equal(3);
  done();
  }, thirdEvent);
  @@ -32,7 +31,7 @@ define(["Test", "Tone/core/Draw", "Tone/core/Tone", "helper/Supports"],
  var secondEvent = Tone.now() + 0.2;
  Draw.schedule(function(){
  callbackCount++;
  - expect(Tone.now()).to.be.closeTo(secondEvent, 0.05);
  + expect(Tone.context.currentTime).to.be.closeTo(secondEvent, 0.05);
  }, secondEvent);
  });
  