Add sequence function to support chaining together multiple animations

[notoriousb1t]

Add the ability to chain animations together in sequence.

Just.sequence(function(builder) {
    return builder
        .fadeIn(el)
        .wait(3000)
        .fadeOut(el)
        .fadeIn(el2)
        .wait(1000)
        .fadeOut(el2);
});

Just.sequence(builder => builder
        .fadeIn(el)
        .wait(3000)
        .fadeOut(el)
        .fadeIn(el2)
        .wait(1000)
        .fadeOut(el2));

[notoriousb1t]

Another possibility:

Just.sequence([
     {
          animation: 'fadeIn',
          element: el
     },
     {
          wait: 3000
     },
     {
          animation: 'fadeOut',
          element: el
     }
])

[notoriousb1t]

This is partially implemented. No wait command, but sequences can be played, reversed, paused, canceled, etc.

[notoriousb1t]

Changing options structure to support options and name to be more descriptive

Just.animateSequence({
  steps: [
    {
      animation: 'fadeIn',
      element: el
    },
    {
      wait: 3000
    },
    {
      animation: 'fadeOut',
      element: el
    }
  ],
  autoplay: false
});