godeferred: Deferred for golang (ports of jsdeferred)

USAGE:

    package main
    
    import . "deferred"
    import "os"
    
    func main() {
        Deferred().
            Next(func() string {
				// pass to next v
                return "Hello World"
            }).
            Next(func(v string) (string, os.Error) {
				// will be shown: Good Morning, Hello World
                println("Good Morning, " + v)

				// make error, goto Error()
                return "", os.NewError("Now time is not morning")
            }).
            Error(func(err *os.Error) {
				// will be shown: Ooooops!: Now time is not morning
                println("Ooooops!: " + (*err).String())
            })
    }


AUTHOR:
	Yasuhiro Matsumoto <mattn.jp@gmail.com>

THANKS:
	cho45: Author of jsdeferred