Replace legacy CmdResult class with new CommandResult class

[tleonhardt]

The CmdResult class in cmd2.py should probably be considered legacy and replaced with the CommandResult class in pyscript_bridge.py.

As long as this wouldn't create an undue burnden on anyone in terms of backwards compatibility, then we should remove all reference to CmdResult and replace it with reference to CommandResult.

Would anyone object to this?

[kotfu]

No objection from me. Should we deprecate it for a release before actually deleting it?

[tleonhardt]

@kotfu I would be in favor of deprecating but not fully removing it for a release, but removing it from the imports in __init__.py while it is deprecated.

@kmvanbrunt As long as deprecating this won't unduly inconvenience you on one of your projects, we will probably move forward with this shortly.