* tkcon.tcl: fixed Retrieve to use the proxy info (Thoyts).

	* tkcon.tcl: fixed Retrieve to use the proxy info (Thoyts).
	Added code so that tkcon.tcl can be sourced in and used like a
	quasi-package.  Once sourced, you can do a 'package require tkcon'
	(there is no pkgIndex.tcl for it), and the first 'tkcon show' will
	initialize anything that is needed.
	(observe): corrected variables tracing to not allow duplicates.
	(dump): improved check for empty named arrays as well as locally
	aliased vars in var dumps.
	Use the 'fixed' font on unix by default.