This removes all references to SDL in the build instructions as the
backend is no longer available. The OpenGL version required is only
1.2 not 1.4. The Windows build instructions were out of date and have
been replaced with a link to the wiki instead.
The order in which the MacPorts are installed is important otherwise we open
the user up to a world of pain.
This patch also tweaks the OS X docs to follow the formatting of the rest of
the docs and to discuss the option of GtkDoc.
http://bugzilla.openedhand.com/show_bug.cgi?id=1865
* clutter/clutter-overview.xml: Split the overview into its own
file, so we gtk-doc can linkify all class names.
* clutter/building-clutter.xml: Split the building instructions
into its own file, for better maintainability.
* clutter/clutter-animation.xml:
* clutter/creating-behaviours.xml:
* clutter/subclassing-ClutterActor.xml: Rename from SGML to XML;
these were not SGML files anyway, but templates.
* clutter/clutter-docs.sgml: Use XInclude instead of the ugly
entities hack.
* clutter/Makefile.am: Update the build.
