Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into fix_dead_link

Author: qingqing01

.travis.yml

@@ -50,7 +50,7 @@ before_install:
     fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo paddle/scripts/travis/before_install.linux.sh; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then paddle/scripts/travis/before_install.osx.sh; fi
-  - pip install wheel protobuf sphinx breathe recommonmark virtualenv numpy sphinx_rtd_theme
+  - pip install wheel protobuf sphinx recommonmark virtualenv numpy sphinx_rtd_theme
 script:
   - paddle/scripts/travis/main.sh
 notifications:

cmake/check_packages.cmake

@@ -30,7 +30,6 @@ if(WITH_DOC)
   find_package(Sphinx REQUIRED)
   find_package(Doxygen REQUIRED)
   find_python_module(recommonmark REQUIRED)
-  find_python_module(breathe REQUIRED)
 endif()
 
 if(WITH_SWIG_PY)

doc/getstarted/build_and_install/build_from_source_en.md

@@ -79,7 +79,7 @@ As a simple example, consider the following:
 
     ```bash
     pip install 'sphinx>=1.4.0'
-    pip install sphinx_rtd_theme breathe recommonmark
+    pip install sphinx_rtd_theme recommonmark
 
     # install doxygen on Ubuntu
     sudo apt-get install doxygen