Add a couple of new books from Packt.

templates/pages/docs/books.html

@@ -10,6 +10,38 @@
         <th class="colLast">Information</th>
 </tr>
 
+<tr>
+        <td class="colFirst">
+            <a href="https://www.packtpub.com/big-data-and-business-intelligence/postgresql-high-performance-second-edition"><img
+                        src="/media/img/docs/books/packt_pg96_high_performance.png"
+                        alt="PostgreSQL 9.6 High Performance" /></a>
+        </td>
+        <td class="colLast">
+                 <b>Title</b>: PostgreSQL 9.6 High Performance<br />
+                 <b>Author</b>: Ibrar Ahmed, Gregory Smith<br />
+                 <b>Language</b>: English<br />
+                 <b>Current version at publication</b>: 9.6<br />
+                 <b>Format</b>: Paperback, eBook<br />
+                 <b>Published</b>: May 2017<br />
+        </td>
+</tr>
+
+<tr>
+        <td class="colFirst">
+            <a href="https://www.packtpub.com/big-data-and-business-intelligence/mastering-postgresql-96"><img
+                        src="/media/img/docs/books/packt_mastering_pg96.png"
+                        alt="Mastering PostgreSQL 9.6" /></a>
+        </td>
+        <td class="colLast">
+                 <b>Title</b>: Mastering PostgreSQL 9.6<br />
+                 <b>Author</b>: Hans-Jürgen Schönig<br />
+                 <b>Language</b>: English<br />
+                 <b>Current version at publication</b>: 9.6<br />
+                 <b>Format</b>: Paperback, eBook<br />
+                 <b>Published</b>: May 2017<br />
+        </td>
+</tr>
+
 <tr>
         <td class="colFirst">
             <a href="https://www.packtpub.com/big-data-and-business-intelligence/postgresql-administration-cookbook-9596-edition"><img