Add information about problems with Pandoc to FAQ

FAQ.html

@@ -64,6 +64,12 @@ document.write('<a h'+'ref'+'="ma'+'ilto'+':'+e+'" clas'+'s="em' + 'ail">'+'mail
 </ul>
 <h2 id="debugging">Debugging</h2>
 <p>Please add notes about problems and solutions below.</p>
+<ul>
+<li><p><code>pandoc: command not found</code></p>
+<p>Probably you didn't install <a href="http://pandoc.org/installing.html">Pandoc</a>.</p></li>
+<li><p><code>pandoc: Error running filter tools/filters/blockquote2div.py</code> due <code>ImportError: No module named 'pandocfilters'</code></p>
+<p>Probably you didn't install <a href="https://pypi.python.org/pypi/pandocfilters/1.2.3">pandocfilters</a>.</p></li>
+</ul>
         </div>
       </div>
       <div class="footer">

FAQ.md

@@ -40,3 +40,13 @@
 ## Debugging
 
 Please add notes about problems and solutions below.
+
+*   `pandoc: command not found`
+
+    Probably you didn't install [Pandoc](http://pandoc.org/installing.html).
+
+*   `pandoc: Error running filter tools/filters/blockquote2div.py`
+    due `ImportError: No module named 'pandocfilters'`
+
+    Probably you didn't install
+    [pandocfilters](https://pypi.python.org/pypi/pandocfilters/1.2.3).