Merge pull request #2358 from luotao1/fix_link

fix Broken link to DL 101 book

.travis.yml

@@ -47,7 +47,7 @@ before_install:
   - if [[ "$JOB" == "PRE_COMMIT" ]]; then sudo ln -s /usr/bin/clang-format-3.8 /usr/bin/clang-format; fi
   # Paddle is using protobuf 3.1 currently. Protobuf 3.2 breaks the compatibility. So we specify the python 
   # protobuf version.
-  - pip install numpy wheel 'protobuf==3.1' sphinx recommonmark sphinx-rtd-theme==0.1.9 virtualenv pre-commit requests==2.9.2 LinkChecker
+  - pip install numpy wheel 'protobuf==3.1' sphinx==1.5.6 recommonmark sphinx-rtd-theme==0.1.9 virtualenv pre-commit requests==2.9.2 LinkChecker
   - |
     function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
 script:

doc/getstarted/index_cn.rst

@@ -7,4 +7,4 @@
   build_and_install/index_cn.rst
   concepts/use_concepts_cn.rst
 
-- `深度学习入门课程 <http://book.paddlepaddle.org/>`_
+- `深度学习入门课程 <http://book.paddlepaddle.org/index.cn.html>`_

doc/getstarted/index_en.rst

@@ -6,4 +6,4 @@ GET STARTED
 
   build_and_install/index_en.rst
 
-- `Deep Learning 101 <http://book.paddlepaddle.org/index.en.html>`_
+- `Deep Learning 101 <http://book.paddlepaddle.org/index.html>`_