Fix some build warnings

"remove type alias"

* init grad op checker

* can run

* add GradeChecker class

* use get_numeric_gradient

* refine code

* add softmax and cross entropy auto grad test

* use close to judge op_grad and numeric_grad

* add cpu and gpu compare

* add comments

* add support_gpu

* fix allclose

* fix name error and symplify code

* optimize gradient checker

* add test_cross_entropy_op

* update gradient_checker.py

* optimize code

* use random.uniform instead of random.random

* fix type bug

* optimize check_grad

* put SupportGPU into OperatorBase

* typo

Add uniform random operator

reduce travis-ci time of build_doc

Add a Kmax sequence score layer.

* remove external_project_dependencies for proto/CMakeLists.txt

Add a nest sequence select layer.

Fix C-API Compilation Error

Update releasing_process.md for pypi upload

* fix some enforce

* remove compatible_type to avoid compile error

* remove shared_ptr

* fix tensor error msg

Remove curl progress info in Dockerfile

Remove wget progress of downloading Go from build log

Update docker docs

Remove wget progress info from downloading MKLML

Master persist more states to etcd, schedule pending timeout after lo…

Add unittest for FillZerosLikeOp

Fix pserver save / load checkpoint