vchoi_fork

[svn-r409] Changes since 19980604
----------------------

./html/Datatypes.html
	Updated documentation for named data types and type sharing.

./src/H5Farray.c
	Split a couple long lines.

./src/H5T.c
	The H5T_copy() demotes immutable types to read-only types so
	they're cleaned up properly and memory is not leaked.

./test/dtypes.c
	Modified to be more consistent with other tests.  Removed all
	internal header files, constants, types, and functions calls
	since the API is now complete enough to test
	everything. Temporary files are now removed.