* parser.y:  Add  a  `%include'  directive  which  includes  files
	verbatim. Syntax is:
	%include filename
	without double quote or anything.
	
	This directive could be used anywhere.
	
	* parser.y (yyerror):   Enhance    verbosity   on   error  message
	accordingly.

	* monoburg.h: Add the info about included file storage.
	* monoburg.c: Update accordingly use of `inputfd'.