revised archive header; changed overview_arc to overview_archive which reads better; modified the @category alias to point to the group pages and to spit out the @ingroup command

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52468 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/doxygen/mainpages/cat_classes.h

@@ -50,6 +50,7 @@
 @li @ref page_class_cat_help
 @li @ref page_class_cat_media
 @li @ref page_class_cat_gl
+@li @ref page_class_cat_archive
 @li @ref page_class_cat_misc
 </td></tr>
 @endTable
@@ -785,6 +786,14 @@ Related Overviews: @ref overview_xrc
 
 
 
+@section page_class_cat_archive Archive
+
+@li wxArchiveInputStream
+@li wxArchiveOutputStream
+@li wxArchiveEntry
+
+
+
 @section page_class_cat_misc Miscellaneous
 
 @li wxCaret: A caret (cursor) object