hdf5doc

Changes since 19990105
----------------------

./INSTALL
./doc/html/Compression.html
./doc/html/Filters.html
	Disassociated GNU from zlib.  Did not change the introduction
	which incorrectly states that compression in hdf5 is available
	only if GNU gzip is available (should read zlib).

	Changed a typo in INSTALL to match what is documented in
	various other places: that zlib 1.1.2 (not 1.0.2) or better is
	required for compression.

	Added a reference to the main zlib web page in various places.

./src/H5Fistore.c
	Fixed a typo in a comment.

./src/H5Flow.c
	Removed carriage returns from the end of lines.

./test/dsets.c
	The deflate compression tests are still run but `-SKIP-' is
	printed instead of `PASSED' if the zlib library was not
	detected at configuration time. The tests check that the
	compression layer (H5Z) is correctly bypassed.