feat: Added support for remote files (via ssh).

docs/cli/envr_restore.md

@@ -10,12 +10,17 @@ envr restore <path> [flags]
 
 * `path` — Path to .env file to restore
 
+Remote files are restored over SSH using an atomic replacement. If the remote
+file has changed since it was backed up, restoration is refused unless
+`--force` is specified.
+
 ### Options
 
 ```
   -h, --help          show this documentation
   -c, --config-file   config file (default "~/.envr/config.json")
       --color         Whether or not to colorize output (default 'auto')
+  -f, --force         Overwrite existing config
 ```
 
 ### SEE ALSO