Merge pull request #1 from PaddlePaddle/outline

Initialize TOC

README.md

+# 深度学习入门
+
+1. [新手入门](fit_a_line/README.md)
+1. [个性化推荐](recommender_system/README.md)
+1. [识别数字](recognize_digits/README.md)
+1. [图像分类](classify_images/README.md)
+1. [词向量](word2vec/README.md)
+1. [情感分析](understand_sentiment/README.md)
+1. [理解单词的语义](label_semantic_roles/README.md)
+1. [机器翻译](machine_translation/README.md)
+1. [图像自动生成](gan/README.md)

classify_images/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/image_classification

fit_a_line/README.md

+TODO: Basing on https://github.com/PaddlePaddle/Paddle/blob/develop/doc/getstarted/basic_usage/index_cn.rst

gan/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/gan

label_semantic_roles/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/semantic_role_labeling

machine_translation/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/seqToseq

recognize_digits/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/mnist

recommender_system/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/recommendation

understand_sentiment/README.md

+TODO: Write about https://github.com/PaddlePaddle/Paddle/tree/develop/demo/sentiment

word2vec/README.md

+TODO: Base on [this tutorial](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/tutorials/embedding_model/index_en.md).