hdf5_ep

[svn-r9533] Purpose:
enhanced performance for h5diff

Description:
the comparison cycle for the 2 buffers read from file was using a compare function
where the type must be checked for each datum (e.g due to recursive calls in compound types)

for atomic types this checking can be avoided


Solution:

introduced cycles for each one of the atomic integer and float class types

Platforms tested:
linux
aix
solaris


Misc. update: