hdf5_der

[svn-r28849] Maintenance: Changed version number in the alpha1 branch to 1.10.0-prealpha1 in preparation
for the source release to DLS before alpha1.

As you will see, many files were modified by the bin/h5vers script because it runs the
./autogen.sh script and regenerates *.in files.

The modified code was built and tested on jam, i.e., generated files are OK.