Ensure all contributors are listed in the authors file

[ergo]

Hi guys, I'm cleaning things and adding some missing stuff into the repo (and others), like... full bsd license text ;)
I'm listing you here to ensure we have every author of all contributions signing the authors file.
Please add date to your names, thanks!

@wichert (done)

@virhilo (done)

@lisaq (done)

@malthe

@JLeszczynski

@aop

@ztane