From 5c66b437be1b0f8bcdce1734c372c2ce8664a43b Mon Sep 17 00:00:00 2001
From: Yang Wang <tiandiwoxin@icloud.com>
Date: Thu, 12 Oct 2017 15:49:35 +0800
Subject: [PATCH] serveral fix for preprocessing (#1609)

* serveral fix for preprocessing

* load all

* fix tests

* more fixes

* meet code review

* fix style

* fix style

* fix tests

* fix tests

* rebase and fix api

* refine test case

* fix tests

* add transpose

* fix tests

* fix expandims

* fix serializer

* fix doc