Add missing categories to HomePage

Thanks to japh++ for pointing this out

Author: paultcochrane

lib/HomePage.pod

@@ -31,6 +31,10 @@ programming language!
 <dd>
     Language or DSL interpreters
 </dd>
+<dt><a href="/categories/module-management.html">Module Management</a></dt>
+<dd>
+    Examples of organising modules
+</dd>
 <dt><a href="/categories/parsers.html">Parsers</a></dt>
 <dd>
     Example grammars
@@ -47,6 +51,10 @@ programming language!
 <dd>
     Implementations for the Computer Language Benchmark Game
 </dd>
+<dt><a href="/categories/tutorial.html">Perl6 Tutorial Examples</a></dt>
+<dd>
+    Initial work in collecting Perl 6 tutorial examples
+</dd>
 <dt><a href="/categories/wsg.html">Winter Scripting Games</a></dt>
 <dd>
     Answers for the Winter Scripting Games