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

Author: velconia

python/paddle/fluid/__init__.py

@@ -65,7 +65,7 @@
               'io',
               'initializer',
               'layers',
-              'transpiler'
+              'transpiler',
               'nets',
               'optimizer',
               'learning_rate_decay',