更新目录结构

docs/2.0/SUMMARY.md

 # Summary
 
 * [Introduction](README.md)
-* 中文教程
-    * 快速入门
-        * [开始使用TensorFlow 2.0](getting_started.md)
-    * 初学者教程
-        * 文本和序列
-            * [Word Embeddings](tutorials/text/word_embeddings.md)
-
-* 中文文档
+* 快速入门
+    * [开始使用TensorFlow 2.0](getting_started.md)
+    * [Effective TensorFlow 2]()
+    * [Migrate from TF 1 to TF 2]()
+    * [Convert with the upgrade script]()
+    * [Get started for beginners]()
+    * [Get started for experts]()
+* 初学者教程
+    * ML basics
+        * [Overview]()
+        * [Classify images]()
+        * [Classify text]()
+        * [Classify structured data]()
+        * [Regression]()
+        * [Overfitting and underfitting]()
+        * [Save and restore models]()
+    * Images
+        * [Convolutional neural networks]()
+        * [Transfer learning with TFHub]()
+        * [Transfer learning with pretrained CNNs]()
+    * 文本和序列
+        * [Word Embeddings 简介](tutorials/text/word_embeddings.md)
+        * [Classify preprocessed text]()
+        * [Classify text with a RNN]()
+    * Estimators
+        * [Premade estimators]()
+        * [Linear models]()
+* ADVANCED TUTORIALS
+    * Customization
+        * [Overview]()
+        * [Tensors and operations]()
+        * [Custom layers]()
+        * [Automatic differentiation]()
+        * [Custom training: basics]()
+        * [Custom training: walkthrough]()
+        * [TF function and AutoGraph]()
+    * Text and sequences
+        * [Generate text with an RNN]()
+        * [Translation with attention]()
+        * [Image captioning]()
+        * [Transformer model for language understanding]()
+    * lmage generation
+        * [Style transfer]()
+        * [DCGAN]()
+        * [Pix2Pix]()
+        * [CycleGAN]()
+        * [Variational autoencoder]()
+        * [Adversarial FGSM]()
+    * Load and preprocess data
+        * [CSV]()
+        * [Numpy]()
+        * [Pandas]()
+        * [lmages]()
+        * [Text]()
+        * [TFRecords]()
+        * [Unicode]()
+        * [TF.Text]()
+    * Distributed training
+        * [Distributed training]()
+        * [Distributed training with custom]()
+        * [training loops]()
+        * [Multi worker training with]()
+        * [Estimator]()
+        * [Multi worker training with Keras]()
+* GUIDE
+    * [Eager essentials]()
+    * [Variables]()
+    * [AutoGraph]()
+    * Keras
+        * [Keras overview]()
+        * [Keras functional API]()
+        * [Train and evaluate]()
+        * [Write layers and models from scratch]()
+        * [Save and serialize models]()
+        * [Write custom callbacks]()
+    * Accelerators
+        * [Distribution strategy]()
+        * [Using GPU]()
+    * Data input pipelines
+        * [tf.data Overview]()
+        * [Performance]()
+    * Serialization
+        * [Checkpoints]()
+        * [Saved models]()
+    * Misc
+        * [Version compatibility]()