* Make param_attr as a strong typed class

Fix #5819

Small fix in profiler.py of fluid.

Fix gru_op related code style

* fix compile on cudnn7

* update

* update

* make silent

* refine install docs

* do not remove files

* follow comments

* update

Add CUDA profiler tools in new framework.

Update the content of design doc for distributed architecture

* Adding log loss operator

* Removing comments

 Add size, height and width for crop layer and switch order layer.

Fix useGpu in HierarchicalSigmoidLayer

Fix hsigmoid_layer  when using GPU.

* batch norm support matrix input

* update gpu code

* format code

* Make 'scale_op' supporting int and int64

* refine .cu file

* Fix MacOS compile

* Update GRPC

* Unset PROTOBUF_EXEC

* Add Python wrap of conv2d_transpose and its unittest

* Follow comments

* Fix format

* Unify fluid submodules to fluid module

Change books just use `import fluid`, not submodules

* Remove g_main_program/g_startup_program

Use default_main_program/default_startup_program instead

* Typo

* Fix CI

* WIP send recv op

* WIP send recv

* put grpc impl in details

* put grpc impl in details

* update wip

* update proto

* update proto

* update proto

* clean cmake

* wip on op implementations

* wip on op implementations

* compile ok adding ut

* wip unitest

* add extern cares for linking

* wip add ut

* working version send recv

* revert optimizer.py

* update test cmake

* add libtool to dockerfile

* update cmake dependency

* update cmake depends

* update cmake grpc depends

* fix cmake dependency

* fix compile error

* fix compile

* follow comments

* update

* update copyfrom

* Refine CheckStyle Script

* Disable linkchecker for build_doc.sh

fix grep socket error in lscpu command

Refine the doc of layers.py

Refine roi_pool_op to avoid warning

Add Factorization Machine Layer

* Fix the latex comment syntax in sgd_op.cc

* Change \textunderscore to \_