Initializes the plugin, this will be executed after the plugin has been created.
This call is done before the editor instance has finished it's initialization so use the onInit event
of the editor instance to intercept that event.

@param {tinymce.Editor} ed Editor instance that the plugin is initialized in.
@param {string} url Absolute URL to where the plugin is located.
function(ed, url) {
			var t = this, oldSize = 0;

			if (ed.getParam('fullscreen_is_enabled'))
				return;

			/**
			 * This method gets executed each time the editor needs to resize.
			 */
			function resize() {
				var deltaSize, d = ed.getDoc(), body = d.body, de = d.documentElement, DOM = tinymce.DOM, resizeHeight = t.autoresize_min_height, myHeight;

				// Get height differently depending on the browser used
				myHeight = tinymce.isIE ? body.scrollHeight : (tinymce.isWebKit && body.clientHeight == 0 ? 0 : body.offsetHeight);

				// Don't make it smaller than the minimum height
				if (myHeight > t.autoresize_min_height)
					resizeHeight = myHeight;

				// If a maximum height has been defined don't exceed this height
				if (t.autoresize_max_height && myHeight > t.autoresize_max_height) {
					resizeHeight = t.autoresize_max_height;
					body.style.overflowY = "auto";
					de.style.overflowY = "auto"; // Old IE
				} else {
					body.style.overflowY = "hidden";
					de.style.overflowY = "hidden"; // Old IE
					body.scrollTop = 0;
				}

				// Resize content element
				if (resizeHeight !== oldSize) {
					deltaSize = resizeHeight - oldSize;
					DOM.setStyle(DOM.get(ed.id + '_ifr'), 'height', resizeHeight + 'px');
					oldSize = resizeHeight;

					// WebKit doesn't decrease the size of the body element until the iframe gets resized
					// So we need to continue to resize the iframe down until the size gets fixed
					if (tinymce.isWebKit && deltaSize < 0)
						resize();
				}
			};

			t.editor = ed;

			// Define minimum height
			t.autoresize_min_height = parseInt(ed.getParam('autoresize_min_height', ed.getElement().offsetHeight));

			// Define maximum height
			t.autoresize_max_height = parseInt(ed.getParam('autoresize_max_height', 0));

			// Add padding at the bottom for better UX
			ed.onInit.add(function(ed){
				ed.dom.setStyle(ed.getBody(), 'paddingBottom', ed.getParam('autoresize_bottom_margin', 50) + 'px');
			});

			// Add appropriate listeners for resizing content area
			ed.onChange.add(resize);
			ed.onSetContent.add(resize);
			ed.onPaste.add(resize);
			ed.onKeyUp.add(resize);
			ed.onPostRender.add(resize);

			if (ed.getParam('autoresize_on_init', true)) {
				ed.onLoad.add(resize);
				ed.onLoadContent.add(resize);
			}

			// Register the command so that it can be invoked by using tinyMCE.activeEditor.execCommand('mceExample');
			ed.addCommand('mceAutoResize', resize);
		}