Update AUTHORS and ChangeLog

Gabriel Lisacarequested to merge
Hoboneer/Surfraw:update-changelog-authors into master

This is mostly for my contributions, since I neglected to do this at the time.

Could some of my entries in the ChangeLog be merged? I don't know how they're typically put together.

If I've missed anyone or this is inaccurate, let me know.

Edited by Gabriel Lisaca

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