* Add support for JSON communication of ssh auth during launch
* Switch to cbor alternative lib as serde cbor has been abandoned
* Refactor some request & response types to work with new cbor lib
* Update cli to always include serde dep
* Expose origin_id of remote process as method
* Add `SessionExt` trait for friendlier methods
* Create `Mailbox` and internal `PostOffice` to manage responses to requests
* Refactor `Session` to use a new `SessionChannel` underneath
* Refactor `Response` to always include an origin_id field instead of being optional
* Update `ProcStdout`, `ProcStderr`, and `ProcDone` to include origin id
* Replace `verbose` option with `log-level`
1. Add --session argument to launch and action
subcommands that accepts file or pipe for
launch and environment, file, or pipe for action
2. Unify session string as "DISTANT DATA <host> <port> <auth key>"
3. Rename utils to session
4. Split out Session file functionality to SessionFile
5. Remove SessionError in favor of io::Error
6. Bump version to 0.4.0 in preparation for that release