should not end up in the accumulator.
    *   Fix toco compilation/execution on Windows.
    *   GoogleZoneProvider class added to detect which Google Cloud Engine zone
        tensorflow is running in.
    *   It is now safe to call any of the C API's TF_Delete\* functions on
        nullptr.
    *   Log some errors on Android to logcat.

pkg net, type Dialer struct, LocalAddr Addr
pkg net, type Dialer struct, Timeout time.Duration
pkg net, type IPAddr struct, Zone string
pkg net, type NS struct
pkg net, type NS struct, Host string
pkg net, type TCPAddr struct, Zone string
pkg net, type UDPAddr struct, Zone string
pkg net/http, const DefaultMaxHeaderBytes = 1048576
pkg net/http, const DefaultMaxIdleConnsPerHost = 2

pkg time, method (Time) UTC() Time
pkg time, method (Time) Unix() int64
pkg time, method (Time) UnixNano() int64
pkg time, method (Time) Weekday() Weekday
pkg time, method (Time) Year() int
pkg time, method (Time) Zone() (string, int)
pkg time, method (Weekday) String() string
pkg time, type Duration int64
pkg time, type Location struct
pkg time, type Month int
pkg time, type ParseError struct