reset, save

- removed 'lock' test, corrected README example
- can now test 'save', 'reset', 'load'

prelim test for potato passes

CHANGELOG.md

@@ -39,6 +39,8 @@ Recorder.FileType changed from method to write-only property
 - Recorder.Prefix
 - Recorder.Eject() references 'Command.Eject'
 - Recorder.State
+- Command.Reset()
+- Command.Save($filepath)
 
 ### Changed