hdf5doc

Purpose:
    API tweak.

Description:
    The H5Sget_select_bounds() API call was using hsize_t arrays for retrieving
the 'start' and 'end' coordinates, which is counter to the rest of the dataspace
API.

Solution:
    Change the arrays to be hssize_t instead.

Platforms tested:
    FreeBSD 4.8 (sleipnir) w/C++
    FreeBSD 4.8 (sleipnir) w/parallel
    h5committested

Misc. update:
    Updated all docs for this change.

    Added 1.4 compatibility #ifdef's