* docs/reference/: Remove tmpl/ subdir.

ChangeLog

docs/reference/tmpl/libxfce4menu-config.sgml

docs/reference/tmpl/libxfce4menu-unused.sgml

docs/reference/tmpl/libxfce4menu.sgml

docs/reference/tmpl/xfce-menu-directory.sgml

docs/reference/tmpl/xfce-menu-element.sgml

docs/reference/tmpl/xfce-menu-environment.sgml

docs/reference/tmpl/xfce-menu-gio.sgml

docs/reference/tmpl/xfce-menu-init-shutdown.sgml

docs/reference/tmpl/xfce-menu-item-cache.sgml

docs/reference/tmpl/xfce-menu-item-pool.sgml

docs/reference/tmpl/xfce-menu-item.sgml

docs/reference/tmpl/xfce-menu-layout.sgml

docs/reference/tmpl/xfce-menu-merger.sgml

docs/reference/tmpl/xfce-menu-monitor.sgml

docs/reference/tmpl/xfce-menu-node.sgml

docs/reference/tmpl/xfce-menu-parser.sgml

docs/reference/tmpl/xfce-menu-separator.sgml

docs/reference/tmpl/xfce-menu-tree-provider.sgml

docs/reference/tmpl/xfce-menu.sgml