Code optimization

vender/github.com/astaxie/beego/logs/alils/config.go

@@ -0,0 +1,13 @@
+package alils
+
+const (
+	version         = "0.5.0"     // SDK version
+	signatureMethod = "hmac-sha1" // Signature method
+
+	// OffsetNewest stands for the log head offset, i.e. the offset that will be
+	// assigned to the next message that will be produced to the shard.
+	OffsetNewest = "end"
+	// OffsetOldest stands for the oldest offset available on the logstore for a
+	// shard.
+	OffsetOldest = "begin"
+)