Dfb

- Added "R" to long listings of size for references. Cleaned up CLI text.
- Updated tests to fix issues with clone files (macOS) and a prior listing change (unrelated to the above)

- Fixed a bug with converting times to local. Dfb was erroneously assuming any specified time was in the time zone of the computer/user *at that moment* and not the timezone of the computer/user for the given time. For example, if it was Standard Time but you gave a date in Daylight Savings Time, it would still make it standard time. This has no affect on anything but listings
- Updated readme

- Fixed (and added test) bug where refreshing without a snapshot could cause an error.
- Changed ``$DFB_CONFIG_FILE` to `$DFB_CONFIG` but will fall back
- Add "Beta" to the version number

- Adds `summary` command which essentially aggregats timestamps.

Minor

- Fixed bug with `ls --real-path` to show the path of the reference marker rather than the referenced path. If you specify once, it shows the reference. Twice will show the referent.
- Changed default `--list / --list-only` option to be `files` if `--recursive`. Adds `--list` flag as shorter option. Adds "both"

- Adds `--real-path` to `ls`
- Adds `utils apath2rpath` and `utils rpath2apath` command line utilities
- Internal: Better mapping of `rpath` to `apath` for some very particular edge cases. Associated tests.
- Edge Case: Filenames without normal extensions but with dfb-style dates already. For example: `file.<date1>` will become `file.<dfb date>.<date1>` and round-trip correctly. This is counter how it may be done (incorrectly) manually but supporting manually tagged files is secondary.

- Adds `--recursive` and `--list-only` to `ls`