Added dispatch.html.
This new file documents Mesa's implementation of GL function dispatch. It's
not quite complete, but I think there's enough there to make it useful.
diff --git a/docs/contents.html b/docs/contents.html
index 7a91aa6..9f09df9 100644
--- a/docs/contents.html
+++ b/docs/contents.html
@@ -73,6 +73,7 @@
<li><a href="fbdev-dri.html" target="MainFrame">fbdev/DRI Environment</a>
<li><a href="glfbdev-driver.html" target="MainFrame">glFBDev Driver</a>
<LI><A HREF="custom.html" target="MainFrame">Custom Development</A>
+<LI><A HREF="dispatch.html" target="MainFrame">GL Dispatch</A>
</ul>
<b>Links</b>