Vendor godep v79 and use it

vendor/github.com/tools/godep/msg.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/kr/pretty"
+)
+
+func debugln(a ...interface{}) (int, error) {
+	if debug {
+		return fmt.Println(a...)
+	}
+	return 0, nil
+}
+
+func verboseln(a ...interface{}) {
+	if verbose {
+		log.Println(a...)
+	}
+}
+
+func debugf(format string, a ...interface{}) (int, error) {
+	if debug {
+		return fmt.Printf(format, a...)
+	}
+	return 0, nil
+}
+
+func verbosef(format string, a ...interface{}) {
+	if verbose {
+		log.Printf(format, a...)
+	}
+}
+
+func pp(a ...interface{}) (int, error) {
+	if debug {
+		return pretty.Print(a...)
+	}
+	return 0, nil
+}
+
+func ppln(a ...interface{}) (int, error) {
+	if debug {
+		return pretty.Println(a...)
+	}
+	return 0, nil
+}
+
+func ppf(format string, a ...interface{}) (int, error) {
+	if debug {
+		return pretty.Printf(format, a...)
+	}
+	return 0, nil
+}