Merge pull request lib#990 from lib/krbsrvname

use krbsrvname for GSS auth; improve GSS docs

Merge pull request lib#988 from lib/win-gss

fix windows kerberos build

Merge pull request lib#976 from lib/lint

gss linting

Update README.md

Merge pull request lib#944 from otan-cockroach/attempt_2400_fix

encode: fix 2400 time encoding for time/timetz

Merge pull request lib#966 from jordanlewis/notif

Add NotificationConnector and methods

Merge pull request lib#965 from jordanlewis/notifications

Add handler for LISTEN/NOTIFY notifications

Merge pull request lib#962 from lib/update-readme

update readme

Merge pull request lib#926 from lib/ping-empty

allow ping during a failed txn

Merge pull request lib#883 from lib/update

bump supported versions; fix tests