goauth2: Update access token expiration by saving it within a memcache Gob. This addresses issue: https://code.google.com/p/goauth2/issues/detail?id=28
goauth2: Update access token expiration by saving it within a memcache Gob.
This addresses issue: https://code.google.com/p/goauth2/issues/detail?id=28

LGTM=adg
R=adg
CC=bradfitz, golang-codereviews
https://codereview.appspot.com/107550043

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

jeisenberg/goauth2,desireebisco/goauth2,djacobow/goauth2,MrDangerous/goauth2,mattga/goauth2,smagic39/goauth2,epelc/goauth2,udhos/goauth2,imrickrick/goauth2,skyeunknown084/goauth2,hiteshjoshi/goauth2,avisri/goauth2,stanwu/goauth2,aquarat/goauth2,treetopllc/goauth2,combucha/goauth2,odeke-em/goauth2,badu/goauth2,lvzhihao/goauth2,happydpc/goauth2,pkieltyka/goauth2