Ltk Lisp binding to the Tk toolkit.

Ltk is licensed under the terms of the Lisp Lesser GNU
Public License (http://opensource.franz.com/preamble.html), known as
the LLGPL.  The LLGPL consists of a preamble (see above URL) and the
LGPL.  Where these conflict, the preamble takes precedence. 
Ltk is referenced in the preamble as the "LIBRARY."
