Port dist_transpiler new added codes
Port ut for clone desc

* Simplify the travis script.
Now use docker to deploy documentations

* Check for the pull request

* Update paddle_build.sh

* Update paddle_build.sh

* get diff for all changes in current branch

* diff with upstream/develop

* let dist test serial

* test

* test

* test2

* wip

* test using pr id

* test

* add log

* add log

* test

* test

* test

* test

* add approver check

* revert travis ci

* merge latest api.spec

* fix get token

* update API.spec

* up to date

Add python3 ABI to paddle_build.sh

* 1. Remove PYTHON_FLAGS from paddle_build.sh in paddlepaddle/paddle:latest-dev

* 1. Add PYTHON_FLAGS back
2. Change SIGKILL to SIGINT and SIGTERM

* 1. Add setup.py.in back

* 1. add pip install open-cv in Dockerfile to avoid libusb_exit hanging up which is caused by the opencv-python package missing

* 1. Add the && \ to line above

* 1. Remove the notice comment

add inference api demo impl