Add hooks to the wpeditimage tinymce plugin and to the image details portion of the media modal.
- Add wp.media.events which is intended to be a global media event bus.
- Add a post-render event to the ImageDetails view that third-party code can leverage to add subviews.
- Performance improvement for the initialization of the PostImage model.
- A bit more markup to the image details template to make it easier to add a view to the advanced options.
Props gcorne, fixes #27698
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git-svn-id: http://core.svn.wordpress.org/trunk@27926 1a063a9b-81f0-0310-95a4-ce76da25c4cd