GitLab

Add Colin Cross (Google CLA)
Add Quentin Perez (Individual CLA)
Add Andy Balholm (Individual CLA)
Add Dirk Gadsden (Individual CLA)
Add Derek Che (Yahoo CLA)

And:

Add CL Sung (Individual CLA), but where gerrit is using personal email
address with CLA signed, but the git commit itself is using an
unverified htc.com address. The commit is:
    https://github.com/golang/oauth2/commit/099e4f0
For github user https://github.com/clsung which says "Self-Employed"
and "clsung@gmail.com". Perhaps the self-employed part is new
since Sep 10, 2014.

Change-Id: Ic1130fb79d167259a9bb76e3be56b9c8ad6b95ca
Reviewed-on: https://go-review.googlesource.com/18369

Reviewed-by: Ian Lance Taylor <iant@golang.org>