add readme

log/README.md

@@ -0,0 +1,22 @@
+### desc
+目前支持 [error], [fatal], [panic]三类错误的hook邮件通知
+### install
+````
+go get git.links123.net/links123.com/pkg/log
+````
+
+### demo
+```
+err := log.NewDefaultLogger(&hooks.Project{
+		Name:   "forum",
+		Domain: "http://api.links123.net/forum",
+	})
+if err != nil {
+    panic(err)
+}
+
+log.Debug("this a debug info")
+log.Error("this a err info")
+log.Fatal("this a fatal info")
+
+```