Included missing periods
[core] Add Y.require() AMD-style

Y.require() works similarly to Y.use() but exposes all the loaded
modules as parameters of the callback in order to use ES6 modules more
easily.

YUI().require(['some-es6-module'], function (ES6Module) {
var foo = ES6Module.foo;
});
YQL: Addition of configuration object.
YQL: Addition of configuration file to example pages.
YQL: Upon failure, ask to use mock data.
YQL: Mocked YQL module.
[io] Mock Yahoo Pipes API calls in doc examples
Replace `set('innerHTML')` with `setHTML`
[DataSource] : Addition of configuration object.
[DataSource] : Addition of configuration object to example pages.
[DataSource] : Upon failure, ask to use mocked data.
[DataSource] : Mocked DataSource module.
[test] Add testCase.next()

`testCase.next(fn)` is a wrapper for an all too familiar pattern of
calling `test.wait()` and `test.resume()` after a callback.
`test.next(fn)` creates a callback that automatically resumes the test,
reducing the bureaucracy for asynchronous testing. Example;

```js
// using test.resume()
Y.jsonp(uri, function (response) {
test.resume(function () {
Y.Assert.isObject(response);
});
});
test.wait();

// using test.next()
Y.jsonp(uri, test.next(function (response) {
Y.Assert.isObject(response);
}));
test.wait();
```
[test] Add unit test for test.next()
Prevent default page action when starting a gesturemove

This prevents some browsers from selecting the page text during a gesture.
[core] Change require() example not to use `default`
[core] Use `hasOwnProperty` instead of `in`...

...to check if a module has exports.
[app] Mock GitHub API in GH Contributors example
[core] Move require() tests to es6-module-tests
[core] Accept a single string as parameter in require()

Y.require() should accept both Y.require(['foo'], fn) and
Y.require('foo', fn)