Fix build error

[shinshin86]

I was looking for a grep tool written in Go for learning Go programming. And I found your repository.
I tryed "go get" command. But build error.

package code.google.com/p/go.crypto/ssh/terminal: unrecognized import path "code.google.com/p/go.crypto/ssh/terminal" (parse https://code.google.com/p/go.crypto/ssh/terminal?go-get=1: no go-import meta tags (meta tag github.com/golang/go did not match import path code.google.com/p/go.crypto/ssh/terminal)

As it seemed that it was necessary to correct the import path, I was fixed.

Thank you!
It's so cool project of gorep!