hdf5_ep

[svn-r3542] 
Purpose:
    Windows port and maintenance
Description:
    Windows Fortran requires interface blocks for each C function
    called from F90 stub.
    I also added comment blocks for each F90 API and fixed several typos.
Solution:
    Added interface blocks.
Platforms tested:
    Linux (eirene) to test that things are not broken on UNIX.