* tkcon.tcl (dir): added fallback in generic dir command to not

	* tkcon.tcl (dir): added fallback in generic dir command to not
	require being run in tkcon.
	(Init): Changed around how all options are initialized to allow
	for tkcon embedders to set their own defaults.  Added a usehistory
	PRIV key that tells us whether to load/save history files.  Added
	showOnStartup PRIV key to control whether tkcon should deiconify
	itself on startup.  Changed setting root to .tkcon to ensure that
	root was just . before.