diff support

[davidmnoriega]

Great module, but looks like when you run it in check/diff mode, the task is skipped. Adding check and diff support would be a great feature.

[retr0h]

Yeah, I haven't put any effort into check/diff because I haven't found check mode very helpful. Check mode with this module alone would probably be fine, but when incorporated into real world playbooks, check mode is pretty worthless.