test=release/1.5

* support avx and noavx core
* add catch and give some log
* fix build
* add missing package
* fix pybind name
* fix import error
* conbime noavx core
* add requirements
* fix unkown message
* fix api spec
* refine and clean
* update
* follow comments
* refine scripts

* document_preview

* change name

* document

* add document_preview.sh

* add document_preview.sh

* add paddle_build.sh

* nohup python

* change port runserver

* test doc

* test=develop

* test=develop

* test=develop

* add git clone FluidDoc,PaddlePaddle.org

* change PaddlePaddle.org

* Add port comment

* change directory

* change PADDLE_ROOT

* 1. move the API check into CPU process
2. adjust the check order

* fix python/paddle/fluid/__init__.py detecting problems

1. specify the cuda arch name and bin to decrease the compile time for inference test=develop
2. simplify the script and add comments
3. remove the fluid process from cicheck

* fix cmakelist detecting problems

* add parallel build script to ci test=develop
* 1. classify the test case as single card/two cards/multiple cards type
   2. run test case according to the run type

* fix cmakelist detecting problems

* test=develop

* test=develop

* test=develop

* test=develop

* test=develop

test=develop

test=develop

test=develop

test=develop

test=develop

* Update detection API add new check document

* update API.spec

* test=develop;add shanyi15 approved API.spec

* test=develop;update PM check API.spec

* check api.spec

* test=develop

* update API.spec

* test=develop;update API.spec

* update API.spec

* cat API.spec

* update documnent in api.spec

* check python35 api.spec

* update print_signatures md5 function

* test=develop

* update API.spec

* test=develop;fix python3 API.spec diff

* test=develop

* test=develop

* test=develop

test=develop

test=develop

test=develop