* Update install_Ubuntu.md

* Update install_MacOS.md

* Update install_CentOS.md

* Update install_Windows.md

* Update compile_CentOS.md

* Update compile_MacOS.md

* Update compile_Ubuntu.md

* renew the install doc for V1.0

* refine doc

* refine MAC_compile with user installed openblas

* fix python3 related issue according to https://github.com/PaddlePaddle/Paddle/issues/13724

* refine python3 LD_LIBRARY and DYLD_LIBRARY set

* fix FAQ

* refine macos compile and install on python settings

* refine mac compile command

* fix comment related format problem

* fix FAQ format problem

* add mac compile on 10.14

* remove py3 compile on mac 10.14

* refine