* Add cpplint_pre_commit.hook

* Update hook

* Disable dropout_op_test.cc

* Remove cpplint.py but requires users to install their version

* fix cpplint error

* update v2/howto/cmd_parameter/index_en.rst

fix https://github.com/PaddlePaddle/Paddle/issues/8909/index_en.rst

* Update index_en.rst

update

* Update index_en.rst

fix punctuation & en.cmd

Fluid api

fix send_recv_op_test

Merge branch develop

Fix for failure in LRN op when MKLDNN is not used

fix compiler error of profiler_test in ONLY_CPU mode

Merge branch develop

kernels of IncrementOp

Fix server shutdown

* Translation for doc Model Configuration

* Adjust

Refine parallel

* fix data transform when op have inplace in/out

* add log

* should not delete scope because Compute maybe async

* optimize code

* add faq

* fix typo

Fix dist error with lr decay layer

* add prefetch_op

* fix ci

* optimize code

* optimize code

* fix include

Cpp parallel executor

* Fix Issue 9388

* Fix typos

Revert "make append activation in place by default (#9417)"

This reverts commit ce16400d.

Update c++ readers doc

* "add functors"

* "remove old code"

* "fix"

* "fix ci"

* "add details"

* "fix ci"

* "fix ci"

* "fix ci"

* "fix ci"

* "remove unused code"

fix dist train selected rows height missing

Add cos and sin