Bump version 1.3.4

Change-Id: I6ccc323b836a1d29b0c06915eacea7efe81c5280
Reviewed-on: http://review.couchbase.org/31697
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>