hdf5doc

Purpose:
    Hack
Description:
    Need to install the files in the examples/java directory, however
    they include installing a Makefile. This was causing havoc with our
    Makefile/configure system.
Solution:
    Changed so that you can specify a "SUBDOCDIR" which will create a
    subdirectory for you and fill it with files specified in PUB_SUBDOCS.
Platforms tested:
    Linux