Recalled message design

[windmemory]

Is your feature request related to a problem? Please describe.
Add new message function for recalled message

Describe the solution you'd like
The design would be like below

For recalled message

• It will have a different message id from the original message
• The type for the message will be Recall
• There will be a new method named recalled to be added to the Message class and used to retrieve the original message

Describe alternatives you've considered
No alternatives :P

[huan]

@seanxlliu Related to wechaty/puppet-wechat#31 (comment)

@windmemory Please feel free to connect other related issues as well.

[huan]

@windmemory Please close this issue if there's no more work needs to do on it.

[windmemory]

Close this issue since the feature is implemented. Thanks for the help @huan