Domain stats and mailmap

[evelikov]

As of pull #35 merging author information is now handled by .mailmap.

Yet developers use the file for two distinct reasons:

• to correct typos
• redirect people from one email to another - most commonly from corporate to development one.

That leads to companies getting smaller attribution in the "Commits by Domain" section.
Sadly we cannot correct every project to use .mailmap 'correctly', yet we want to give credit where it's due.

I would like to address that and the quickest way is to revert the above PR.
Any objections, alternative suggestions how to address the issue?