* Adds in-editor UI for image attachments. Most of this UI should be able to migrate to all images in a future commit.
* Removes the wpeditimage TinyMCE plugin from the default plugins array.
* Add `wp.media.fit`, a helper method to constrain dimensions based upon a maximum width and/or height.
* Add html attribute parsing and string generation utilities (currently stored in mce-views).
* Calling `remove` on a TinyMCE views now ensures that the the parent and references are removed as well.
* Fixes a bug where we weren't sending the full array of results to matches in wp.mce.view.
see #21390, #21812, #21813.
git-svn-id: http://core.svn.wordpress.org/trunk@22012 1a063a9b-81f0-0310-95a4-ce76da25c4cd