hdf5doc

Description:
    Added lists or descriptions of the following:
        removed Fortran subroutines (matching the removed C functions)
        more C functions with changed syntax or changed symbols/values
        some Fortran subroutines with changed symbols/values
        information regarding changed ENUMs and structs
        new VAX datatypes
    A few edits in the existing 1.8 material
Tested:
    Safari