Various Gource questions

[Andre601]

I went through the wiki to get as many answers as I can get, but there are still some open questions I hope to receive some answers for.

Avatar names with spaces, single quotes, etc.

From what I understand would Gource try and use images with matching names for what is displayed in the animation?
If that's the case, how would it deal with names that have ' and spaces and alike?
If that's not the case, then what name is used and how could I obtain these to properly set the right images?

Can you merge users?

In the animation did I notice that I appear as two separate users. Once as Andre601 and another time as Andre_601.
My guess is, that one of the two is my GitHub Account making the commits.

Is there a way I could merge these two accounts together, so that it shows a single name?

Can you display text/make notes or similar for specific git events?

I would like to show specific text for particular events in my git history. Namely, I would like to add specific comments for specific releases (tags) I've made throughout the history.
Is there a way to tell Gource to show text, or do something specific (i.e. leave a log containing a timestamp or similar) for when a tag was created or deleted?

[Ryuno-Ki]

I had the same question years ago. Are you aware of .mailmap files?