Requirements list needs update

I noticed that hdf5-devel is needed to build for linux-x86_64. This should be added to README as a prereq.

This raises a question about if ADSupport is needed any more - I understood that ADSupport only was a dependency for hfd5-drivers. Can you confirm this part @yannickmariette or @victornadot ? (i.e., can I remove the ADSupport dependency?)