`BotAI.can_afford` result wrapper (#23)
`BotAI.can_afford` result wrapper (#23)

* Add inline condition to prevent converting of 'None' to string for non-Windows platforms

* Wrap cwd expression in parentheses

* Wrap the response of `BotAI.can_afford` to return a wrapper

Fixes #22

* Add `action_result` property to CanAffordWrapper

Dentosal/python-sc2