Add automatically generated change log file.

[skywinder]

Hi, as I can see, you are carefully fill tags and labels for issues in your repo.
I created a github_changelog_generator, that generate change log file based on tags, issues and merged pull requests (and split them to separate lists according labels) from GitHub issue tracker.
This Change Log was automatically generated by this script.
It helps to easily found what and when was fixed and implemented.

p.s.
now it split issues by tags bug, and enchantments.
If you want to exclude not-related to changelog issues (such as mine - #54) - just set proper label to issue (any of question duplicate invalid wontfix)

And simply re-run script: github_changelog_generator morhetz/gruvbox in your repo folder.

Hope you find this commit as useful.

[morhetz]

Oh, wow. That's awesome.

[skywinder]

Glad to hear it, thanks! 🎉
Will be glad to receive any feedback and suggestions about improvements and missing features.