Update the doc links to point at 0.13.1

index.html

@@ -13,14 +13,14 @@ For information about building json-c, see the <a href="https://github.com/json-
 Note: for the very latest development docs <a href="https://github.com/json-c/json-c">clone the source</a> and run "doxygen", then look in the doc directory.
 <br>
 
-Current release: <a href="json-c-0.13/doc/html/index.html">json-c-0.13</a>
+Current release: <a href="json-c-0.13.1/doc/html/index.html">json-c-0.13.1</a>
 <br>Best starting points:
-<a href="json-c-0.13/doc/html/json__object_8h.html">json_object.h</a> or
-<a href="json-c-0.13/doc/html/json__tokener_8h.html">json_tokener.h</a>
+<a href="json-c-0.13.1/doc/html/json__object_8h.html">json_object.h</a> or
+<a href="json-c-0.13.1/doc/html/json__tokener_8h.html">json_tokener.h</a>
 
-You can also look at the tests in <a href="https://github.com/json-c/json-c/blob/json-c-0.13/tests/">the tests directory</a> for some examples.<br>
+You can also look at the tests in <a href="https://github.com/json-c/json-c/blob/json-c-0.13.1/tests/">the tests directory</a> for some examples.<br>
 One of the simplest examples is 
-<a href="https://github.com/json-c/json-c/blob/json-c-0.13/tests/test2.c">test2.c</a>.
+<a href="https://github.com/json-c/json-c/blob/json-c-0.13.1/tests/test2.c">test2.c</a>.
 
 
 <hr>
@@ -28,6 +28,12 @@ One of the simplest examples is
 <h3>Older releases</h3>
 
 <ul>
+<li><a href="json-c-0.13/doc/html/index.html">json-c-0.13</a>
+<br>Best starting points:
+<a href="json-c-0.13/doc/html/json__object_8h.html">json_object.h</a> or
+<a href="json-c-0.13/doc/html/json__tokener_8h.html">json_tokener.h</a>
+</li>
+
 <li><a href="json-c-0.12.1/doc/html/index.html">json-c-0.12.1</a>
 <br>Best starting points:
 <a href="json-c-0.12.1/doc/html/json__object_8h.html">json_object.h</a> or