Add support for ": example" elements

org/testdata/blocks.html

@@ -27,6 +27,14 @@ multiple lines including
 empty lines!
 
 it also has multiple parameters
+
+note that /inline/ *markup* ignored
+</pre>
+<pre class="example">
+examples like this
+are also supported
+note that /inline/ *markup* ignored
+
 </pre>
 <blockquote>
 <p>

org/testdata/blocks.org

@@ -21,8 +21,14 @@ multiple lines including
 empty lines!
 
 it also has multiple parameters
+
+note that /inline/ *markup* ignored
 #+END_EXAMPLE
 
+: examples like this
+: are also supported
+: note that /inline/ *markup* ignored
+
 #+BEGIN_QUOTE
 Mongodb is *webscale*. (source: [[http://www.mongodb-is-web-scale.com/][mongodb-is-web-scale]])
 

org/testdata/lists.html

@@ -84,5 +84,11 @@ and text with an empty line in between as well!
 <p>
 unordered list item 4
 </p>
+<pre class="example">
+with an example
+
+that spans multiple lines
+
+</pre>
 </li>
 </ul>

org/testdata/lists.org

@@ -18,3 +18,6 @@
 
      and text with an empty line in between as well!
 - unordered list item 4
+  : with an example
+  : 
+  : that spans multiple lines