Window splitting. Two vertical panes fixed 50% each. This is a huge diff, still a couple of bugs (notably heap corruption somewhere causing segfault on exit).

cmd.c

@@ -1,4 +1,4 @@
-/* $Id: cmd.c,v 1.73 2009-01-11 23:14:57 nicm Exp $ */
+/* $Id: cmd.c,v 1.74 2009-01-11 23:31:46 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -71,9 +71,11 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_show_options_entry,
 	&cmd_show_window_options_entry,
 	&cmd_source_file_entry,
+	&cmd_split_window_entry,
 	&cmd_start_server_entry,
 	&cmd_swap_window_entry,
 	&cmd_switch_client_entry,
+	&cmd_switch_pane_entry,
 	&cmd_unbind_key_entry,
 	&cmd_unlink_window_entry,
 	NULL