Renamed from github user to use my real name in CONTRIBUTORS, added my name
to AUTHORS.

Change-Id: I671638f1525d44bcc2b0a08d0dcff6adb1717510
GitHub-Last-Rev: b989e185de9ad2d1207085043fcdc821d851c562
GitHub-Pull-Request: golang/go#29823
Reviewed-on: https://go-review.googlesource.com/c/158540Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>