Github Migration

As Bitbucket is sunsetting Mercurial support, I no longer have any excuse to not convert and migrate my plugins to Git / GitHub.

Now that 4.25.1 is out and baselined and the plugin is stable in it, I am going to run that migration now while I have the time.

Future patches to the 4.25 version will then come in to the Github page and I will remove links to the bitbucket repo.

Expect new commits to be sparse during this period as I want to clean up some old branches and files from the template repository.

Duration will be more than two days, likely less than a week.