0.8.0.52

0.8.0.52
	large contrib/simple-streams patch including many CMUCL
	changes by Paul Foley
	(Thanks to Rudi Schlatte sbcl-devel 2003.06.08)

	... melded streams are implemented

	... removed device-extend; it's deprecated in acl's
	    simple-streams implementation and will go away there too

	... prettier print-object methods

        ... various small fixes

	... Implemented file-position

	... Removed some sbcl internals redefinition: no need to
	    rewrite unix-lseek, use sb-posix for mmap, munmap

        ... Can now remove sb-grovel requirement too

	... Commented out (but not deleted yet) heavily
	    sbcl-internals-dependent slot access machinery
	    (def-stream-class, with-stream-class, sm).

        ... Various bug fixes, e.g. read-line now works for lines
	    longer than 80 characters