Added test for creation of chunked datasets.
./test/dsets.c
./test/istore.c
./test/tfile.c
Template changes.
./test/th5p.c
Accommodated changes to H5P.
Added new tests.
./test/dsets.c NEW
Tests datasets.
./test/dspace.c NEW
Tests data spaces.
./test/dtypes.c NEW
Tests data types.
./test/istore.c
./test/tfile.c
./test/th5p.c
./test/theap.c
./test/tohdr.c
Changed to work with new function names.
./test/testhdf5.c
Removed the data type and dataset tests since they're now in
their own files. They had to be rewritten because of extensive
changes to those interfaces.