Added SetTimeNow function to override global timeNow func

.gitignore

@@ -0,0 +1,4 @@
+*.test
+.idea
+*.iml
+*~

README.md

@@ -60,6 +60,9 @@ func main() {
 
 	// Set the backends to be used.
 	logging.SetBackend(backend1Leveled, backend2Formatter)
+
+	// Set log time to UTC, default is Local
+	logging.SetTimeNow(time.Now().UTC)
 
 	log.Debugf("debug %s", Password("secret"))
 	log.Info("info")

logger.go

@@ -123,6 +123,11 @@ func MustGetLogger(module string) *Logger {
 	return logger
 }
 
+// SetTimeNow configures the time.Time value generated for log time values
+func SetTimeNow(now func () time.Time) {
+	timeNow = now
+}
+
 // Reset restores the internal state of the logging library.
 func Reset() {
 	// TODO make a global Init() method to be less magic? or make it such that

logger_test.go

@@ -4,7 +4,10 @@
 
 package logging
 
-import "testing"
+import (
+	"testing"
+	"time"
+)
 
 type Password string
 
@@ -60,3 +63,20 @@ func TestPrivateBackend(t *testing.T) {
 		t.Error("logged to defaultBackend:", MemoryRecordN(privateBackend, 0))
 	}
 }
+
+func TestLogger_SetTimerNow(t *testing.T) {
+	_ = InitForTesting(DEBUG)
+	_ = MustGetLogger("test")
+
+	if now := timeNow(); now != time.Unix(0, 0).UTC() {
+		t.Error("test timeNow incorrect", now)
+	}
+
+	SetTimeNow(func() time.Time {
+		return time.Unix(1, 1)
+	})
+
+	if now := timeNow(); now != time.Unix(1, 1) {
+		t.Error("test timeNow dit not get overwritten", now)
+	}
+}