ibute is obligatory for <code>&lt;img&gt;</code> tag.
					<code>alt</code>, <code>width</code>, <code>height</code>
					and <code>class</code> attributes are accepted but
					<code>class</code> must be either <code>class="left"</code>
					or <code>class="right"</code>
				</li>
				<li>
					<code>table tr th td caption</code> - These tags
					are accepted by the editor. Any tag attributes will be discarded.
				</li>
				<li>
					<code>span{!font-family}</code>, <code>span{!color}</code>,
					<code>