Minor fix for update_signatures.py; added new version of PRONOM signature file; added new version of PRONOM container signature file.
Added basic OPF Metadata file.

The OPF metadata file .opf.yml provides simple, human/machine readable project information for automated tools, see http://wiki.opf-labs.org/display/PT/GitHub+Guide#GitHubGuide-ProjectInformation for details.
updated signatures and fixed STDIN bug
sync signature files
Merge pull request #1 from openplanets/master

latest from upstream