WIP Implement MASTER_AUTO_POSITION

Hello,
here is a WIP of mysql replication with MASTER_AUTO_POSITION. Let me know what you think.
I found the related issues :)
https://github.com/PyMySQL/PyMySQL/commit/e7f2cb78c134b538c84ff3f608fc6d6c9963e10a

We can add a link in the source with the commit