DI register method

@name register
@function
@access public
@param {String} name namespace register object into
@param {Cream} obj
@param {String} after namespace register object after
function(name, obj, after) {
  if (typeof after === 'string' && !inject(after)()) {
    caramel.once('register:' + after, function() {
      register(name, obj);
    });
    return;
  }

  var path = name.split('.');
  var ref = container;

  for (var i = 0; i < path.length - 1; i++) {
    if (!ref[path[i]]) {
      ref = ref[path[i]] = {};
    } else {
      ref = ref[path[i]];
    }
  }

  if (!ref[path[path.length - 1]]) {
    ref[path[path.length - 1]] = { cream : obj };
  } else {
    ref[path[path.length - 1]].cream = obj;
  }

  createCream(name, obj);
  caramel.emit('register:' + name);
}