* Moved some functions from window-commands.lisp to gui.lisp (and the
CLIMACs-GUI package) and export them. * The kill ring is no longer a global, special symbol, thus fixing a bunch of problems regarding sharing of kill rings between instances of Climacs (and remembering the kill ring across invocations). * Various yank-commands no longer signal an error when the kill ring is empty. This is done by handling the flexichain:at-end-error condition, which is suboptimal - user code should not need to be aware of the implementation of the kill ring. Will be fixed at some point. CVS problems made it too hard to divide this up into several patches, sorry.