jasmine "it" function fix for async, adding another parameter to support promises and augment waitFor.

gistfile1.js

(function(){
  //jasmine "it" function fix for async, adding another parameter to support promises and augment waitsFor.
  var generate_promise = function() {
    var promise = {
      check_for: false,
      waits: function() {
        waitsFor(function() {
          return promise.check_for;
        });
      },
      done: function() {
        this.check_for = true;
      }
    };
    promise.done = promise.done.bind(promise);
    return promise;
  };
  
  jasmineIt = it;
  it = function(message, func) {
    var promise = generate_promise(),
      callback = function() {
        func.call(this, promise.done);
        promise.waits.call(this);
      };
  
    jasmineIt(message, callback);
  };
  
  //usage example:
  
  describe("a test", function() {
    it("should do something", function(done/* call this function upon async done */) {
      runs(function() {
        some_async_function_with_callback(function() {
          expect(true).toBe(true);
          done();
        });
      });
    });
  });  
}());