Completed the first-cut Archive model + migration + unit test
Can't use subprocess.check_output on Python 2.6
Fixed a bug in archive --directory
We **need** to monkey patch the url_parse library to htok "scp:" urls.
Cut out the python ssh / scp client dependencies.  Use native commands instead
Add admin page for Archive objects
Started work on incremental mode
Unit tests + bug fixes for --incremental
Snapshot ...
A recorded archive url now includes the Archive id for (loose) uniqueness.
Can't use a 'commands' hash with params from Location.ProviderParameters
plus a tidy up of command expansion, etc
Implemented archive size min / max / total limits (first cut).
Bug fixes
Another bug
Documentation
Refactor transfer API to reduce dependencies on MyTardis model classes
More refactoring of the transfer API / implementations
More updates to the transfer APIs
Implement put_archive and put_file for the local provider.
Another minor rebase snafu ...