Emborg

- made extensive changes to *manifest* command to make it more flexible

- colorized the output based on file health (green implies healthy, red implies unhealthy)
- added ``--no-color`` option to manifest to suppress colorization
- added *colorscheme* setting.
- added *manifest_default_format* setting.
- added support for *Borg* *list* command field names for both reporting and sorting.
- added *Emborg* variants to some of the *Borg* field names.
- added ``--show-formats`` command line option.
- added ``--format`` command line option.
- added ``--sort-by-field`` command line option.
- change predefined formats to use fields that render faster.

- it is now an error for *prefix* setting to contain ``{{now}}``.
- settings command will now print a single setting value if its name is given.

These changes are not backward compatible. If you have a manifest_formats setting from a previous version, it may need to be updated.

- add ``--progress`` command-line option and *show_progress* option to the *create* command.

- added --list option to *prune* command.

- added ``--repo`` option to *delete* command.
- added ``--relocated`` global command-line option.
- *Emborg* now automatically confirms to *Borg* that you know what you are doing when you delete a repository or repair an archive.

- *borg* command allows archive to be added to ``repo``.
- added *encoding* setting.

- refinements and bug fixes.