Fix UnTarTask attribute from destdir to todir

per http://phing.info/trac/ticket/127

docs/phing_guide/book/chapters/appendixes/AppendixC-OptionalTasks.html

@@ -1293,7 +1293,7 @@ <h2><a name="UntarTask"></a>UntarTask</h2>
 <p> The <em>UntarTask</em> unpacks one or more tar archives.</p>
 
 <h3>Examples</h3>
-<pre>&lt;untar file=&quot;testtar.tar.gz&quot; destdir=&quot;dest&quot;&gt;
+<pre>&lt;untar file=&quot;testtar.tar.gz&quot; todir=&quot;dest&quot;&gt;
   &lt;fileset dir=&quot;.&quot;&gt;
     &lt;include name=&quot;*.tar.gz&quot;/&gt;
     &lt;include name=&quot;*.tar&quot;/&gt;
@@ -1321,7 +1321,7 @@ <h3>Attributes</h3>
       <td>No</td>
     </tr>
     <tr>
-      <td>destdir</td>
+      <td>todir</td>
       <td>String</td>
       <td>Directory to unpack the archive(s) to</td>
       <td>none</td>
@@ -1339,7 +1339,7 @@ <h2><a name="UnzipTask"></a>UnzipTask</h2>
 <p> The <em>UnzipTask</em> unpacks one or more ZIP archives.</p>
 
 <h3>Examples</h3>
-<pre>&lt;unzip file=&quot;testzip.zip&quot; destdir=&quot;dest&quot;&gt;
+<pre>&lt;unzip file=&quot;testzip.zip&quot; todir=&quot;dest&quot;&gt;
   &lt;fileset dir=&quot;.&quot;&gt;
     &lt;include name=&quot;*.zip&quot;/&gt;
   &lt;/fileset&gt;
@@ -1366,7 +1366,7 @@ <h3>Attributes</h3>
       <td>No</td>
     </tr>
     <tr>
-      <td>destdir</td>
+	  <td>todir</td>
       <td>String</td>
       <td>Directory to unpack the archive(s) to</td>
       <td>none</td>