Fixed cc interface

[mohayonao]

• [ ] append mode

default append mode will be true

cc.execute(code); // same as
cc.execute(code, true)

• [x] isPlaying()

cc.isPlaying();// return true or false

• [x] auto run

now

var cc = new CoffeeCollider();
cc.play();
cc.execute(code);
// cc.pause();

new (auto run interface)

var cc = new CoffeeCollider();
cc.run(code); // play & execute
// cc.pause(); // (in the future) auto stop

• [x] load a file

cc.load("test.coffee", function(code) {
  cc.run(code);
});

[mohayonao]

default append mode should not be changed. it's very bad changing.