add editable_cells.c, list_store.c and tree_store.c

add editable_cells.c, list_store.c and tree_store.c

Tue Oct  2 20:18:32 2001  Kristian Rietveld  <kristian@planet.nl>

        * demos/gtk-demo/Makefile.am: add editable_cells.c,
        list_store.c and tree_store.c

        * demos/gtk-demo/appwindow.c: remove tearoff item from
        File menu, put menubar and toolbar in handle boxes.

        * demos/gtk-demo/genincude.pl: various changes to support trees

        * demos/gtk-demo/main.c: various changes to support trees

        * demos/gtk-demo/stock_browser.c: changed name of demo
        to Stock Item and Icon Browser, so geninclude.pl doesn't see
        it as child

        * demos/gtk-demo/editable_cells.c: new file/demo
        * demos/gtk-demo/list_store.c: new file/demo
        * demos/gtk-demo/tree_store.c: new file/demo