[ADD] generate UUID if it's not set (#338)

* support openID2.0

* generate UUID if it's not set

.gitignore

@@ -34,6 +34,7 @@ _test
 /etc/log/log.test.json
 /data*
 /tarball
+/run
 
 .idea
 .index

src/models/user.go

@@ -205,6 +205,10 @@ func (u *User) Save() error {
 		return fmt.Errorf("user.id[%d] not equal 0", u.Id)
 	}
 
+	if u.UUID == "" {
+		u.UUID = GenUUIDForUser(u.Username)
+	}
+
 	cnt, err := DB["rdb"].Where("username=?", u.Username).Count(new(User))
 	if err != nil {
 		return err