Restore geometry of all windows before exiting/restarting (Thanks Sasha)

This fixes ticket #185

src/commands.c

@@ -32,6 +32,7 @@
 #include "resize.h"
 #include "log.h"
 #include "sighandler.h"
+#include "manage.h"
 
 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
         /* If this container is empty, we’re done */
@@ -977,6 +978,7 @@ void parse_command(xcb_connection_t *conn, const char *command) {
         /* Is it an <exit>? */
         if (STARTS_WITH(command, "exit")) {
                 LOG("User issued exit-command, exiting without error.\n");
+                restore_geometry(global_conn);
                 exit(EXIT_SUCCESS);
         }