Release scripts: Update create-tarball to include docs and other packaging details.
I've updated the create-tarball script to support command line options,
docs build (or copy and existing build), and to run the packaging update
scripts.
$ release-scripts/create-tarball --help
Usage release-scripts/create-tarball [options]
--help Print command usage
--branch <name> Specify the branch to to create the archive file from
--copy-docs <dir> Copy documentation from <dir> rather than building
--tag <name> Tag name for release
--keyid <email> The GnuPG key ID used to sign the release tag