Add support for GL_APPLE_vertex_array_object.  Several test programs
and demos are also added.

Adding basic support to drivers should be as easy as just enabling the
extension, though thorough test would also be required.
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 9838e0b..3ccbe54 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -43,6 +43,7 @@
 #include "fbobject.h"
 #include "texrender.h"
 #endif
+#include "arrayobj.h"
 
 #include "driverfuncs.h"
 #include "tnl/tnl.h"
@@ -220,6 +221,11 @@
    driver->BeginQuery = NULL;
    driver->EndQuery = NULL;
 
+   /* APPLE_vertex_array_object */
+   driver->NewArrayObject = _mesa_new_array_object;
+   driver->DeleteArrayObject = _mesa_delete_array_object;
+   driver->BindArrayObject = NULL;
+
    /* T&L stuff */
    driver->NeedValidate = GL_FALSE;
    driver->ValidateTnlModule = NULL;