split out logger into proper package

logger/logger.go

@@ -0,0 +1,30 @@
+package logger
+
+import "log"
+
+// Logger has just two levels: info and debug
+type Logger interface {
+	Info(...interface{})
+	Debug(...interface{})
+}
+
+// NewLogger returns a logger that has just two levels: info and debug
+func NewLogger(debug bool) Logger {
+	return &l{
+		debug: debug,
+	}
+}
+
+type l struct {
+	debug bool
+}
+
+func (l *l) Info(s ...interface{}) {
+	log.Println(s...)
+}
+
+func (l *l) Debug(s ...interface{}) {
+	if l.debug {
+		log.Println(s...)
+	}
+}