hdf5_msb

[svn-r4915] Purpose:
    Bug fix & feature add
Description:
    Added new API function H5Sget_select_type to determine type of selection in
    a dataspace.  Return values are defined by the H5S_sel_type enumerated type
    in H5Spublic.h

    Also, hyperslab operations involving a "all" or "none" selection are not
    generating the correct resulting selections.

Solution:
    Added regression tests to verify correction operation of hyperslab
    operations against "all" and "none" selections.  New tests also verify
    H5Sget_select_type() API call.

Platforms tested:
    FreeBSD 4.5 (sleipnir)