iOS7 fix for morpheus.js

morhpeus.js

var matchingTimestamps;
  frame(function(timestamp) {
    // if we're using a high res timer, make sure timestamp is not the old epoch-based value.
    // http://updates.html5rocks.com/2012/05/requestAnimationFrame-API-now-with-sub-millisecond-precision
    // patch for https://github.com/ded/morpheus/issues/53
    // check if timestamps are on the same scale and cache result
    var argument = timestamp > 1e12,
        getTime = now() > 1e12;
    matchingTimestamps = argument === getTime;
  });

  function render(timestamp) {
    var i, count = children.length
    if (!matchingTimestamps) timestamp = now()
    for (i = count; i--;) {
      children[i](timestamp)
    }
    children.length && frame(render)
  }