Correct documentation typo

Signed-off-by: Alex Nelson <a.nelson@prometheuscomputing.com>
Allow filenames to occur 0 times

DFXML can also be used to distribute hash sets.  In this case, it may
not be appropriate to include filenames.  For instance, multiple
filenames may map to distinct hashes.

Signed-off-by: Alex Nelson <a.nelson@prometheuscomputing.com>
Allow fileobject/name_type to be optional

This element may be redundant in DFXML files that list only
regular files.
Add public domain license text

Signed-off-by: Alex Nelson <a.nelson@prometheuscomputing.com>
Batch changes into v1.1.0rfc2

This updated RFC version introduces low-impact changes into the DFXML
schema, and clarifies the schema license.

Signed-off-by: Alex Nelson <a.nelson@prometheuscomputing.com>
Merge pull request #6 from ajnelson/for_v1.1.0rfc2_seriesv0

For v1.1.0rfc2, seriesv0