Update .mailmap and CONTRIBUTORS

[messmerd]

I modified the .mailmap file to fix as many duplicate contacts as I could, while also updating names and email addresses.

After that, I ran git shortlog -sne master | cut -c8- > doc/CONTRIBUTORS to regenerate the CONTRIBUTORS file, as seen here.

The scripts from this webpage were a great help in spotting duplicates, but some may have been missed.

@LMMS/developers If the doc/CONTRIBUTORS file here contains duplicate or incorrect information about you, or if you'd like any of your contact information changed, please let me know and I can fix it.

The contributor information is shown in the About window inside LMMS, so it's a good idea to fix this in preparation for the next alpha.

TODO:

• Update doc/AUTHORS?

[tresf]

Looks great, thanks for going through this list. Hopefully a few other devs will read and chime in if they see anything that needs correcting.

[bratpeki]

My info looks great!

[bratpeki]

I appear in CONTRIBUTORS but not in mailmap. I don't know what the mailmap is so it's likely me misunderstanding something!

[tresf]

I appear in CONTRIBUTORS but not in mailmap. I don't know what the mailmap is so it's likely me misunderstanding something!

mailmap is the dedupe used for cleaning up CONTRIBUTORS.

mailmap is for people that have use multiple different email addresses throughout time. This occurs naturally as our emails change, or on accident as older git versions were more lax about what was typed into the email field... as well as occuring when multiple emails are configured for a single GitHub id (e.g. work/personal emails tied to the same GitHub id).