Add AnnotationRef counters to the xsd-fu templates
Add a script for running all of the necessary xsd-fu commands

The BF_HOME environment variable must be set first; this should be the
full path to a working clone of bioformats.git.  Then it is just a
matter of running './xsd-fu-generate', as all of the resulting files
will be copied to the correct location in bioformats.git.