_standardize.eventListener_ renaming

Changed to ```standardize.events``` since from now on it should contains
more stuff than only listeners like ```createEvent``` polyfill and also
having ```dispatchEvent``` which, although being related, isn't a
listener method.
Moving _CustomEvent_ from _window_ to _events_

```CustomEvent``` polyfill now belongs to ```standardize.events```.
The class, constructor and methods remain on their own file.
Moving _createEvent_ from _document_ to _events_

```createEvent``` polyfill now belongs to ```standardize.events```.
Renaming file _eventListener.js_ to _events.js_
Syncing documentation

Also creating docs for new methods added
Syncing event standardization calls on elements
Removing duplicated _CustomEvent_ fallback

Now should be declared only at **events.js**
Removing duplicated _createEvent_ fallback

Now should be declared only at **events.js**
Moving _window_ standardization to _standardize_

Once **window.js** contains only one method, is reasonable to put it on
**standardize.js** and get rid of **window.js** file

Also sync'd event standardization calls on window
Syncing event standardization calls on document
Removing _createEvent_ wrapper

Since we target form elements and, if created dinamically, they should
be attached to a form via ```form.appendChild```, we dont need to
standardize every created element. Just standardize them after
form-hooking process.
Moving _document_ standardization to _standardize_

Once **document.js** contains only one method, is reasonable to put it
on **standardize.js** and get rid of **document.js** file
Merge branch 'interface-rename' into polyfills