protractor wait for item to be present with promise - stolen from http://docsplendid.com/archives/209

protractor-is-present.js

browser.wait(function() {
  var deferred = protractor.promise.defer();
  element(by.id('some-element')).isPresent()
  	.then(function (isPresent) {
      deferred.fulfill(!isPresent);
    });
  return deferred.promise;
});