* rnrs/programs.scm (command-line): Also check kawa.command.line
	property and ApplicationMainSupport:commandName variable when
	trying to figure out command name.

	* ApplicationMainSupport.java (commandName): New field.
	(setArgs): Set commandName if unset and the
	kawa.command.name property is set.

	* repl.java (processArgs): Fix handling of meta-arg "\" - don't
	process injected arguments, but instead adjust args array and
	continue.  This is more flexible, and simpler.

	* repl.java (processArgs): Update copyright year.

	* LispReader (readSpecial): Allow ' ' after '#!'.
	If lines ends with '\', skip next line as well.
	This helps with handling the scsh-style "meta-arg".
	Also ApplicationMainSupport.commandName if unset.

	* command1.scm, commands2.scm, command3.scm: New tests to
	check behavior of (command-line).
	* Makefile.am: Update accordingly.