为gtime添加scanner和valuer

os/gtime/gtime_sql.go

@@ -0,0 +1,17 @@
+package gtime
+
+import (
+	"database/sql/driver"
+)
+
+//add Scanner
+func (t *Time) Scan(value interface{}) error {
+	newTime := New(value)
+	t.Time = newTime.Time
+	return nil
+}
+
+//add valuer
+func (t *Time) Value() (driver.Value, error) {
+	return t.Time, nil
+}