GitLab

* speed up the build

* remove gpu docker

* add boost ppa

* remove duplicate installs

* Update test.sh

* conda install mkl qt

* addd windows

* Update .vsts-ci.yml

* fix gpu boost

* downgrade Xcode version on Azure

* fixed docs and warning

* use new keywords

* fix conda install

* try to fix conda

* conda

* dowgrade gcc version on Azure

* small fixes, update Artifacts condition for easy debug.

* Update CMakeLists.txt

* Update CMakeLists.txt

* Update CMakeLists.txt

* Update setup.sh

* Update CMakeLists.txt

* Update .vsts-ci.yml

* Update CMakeLists.txt

* remove the lgamma

* update comment

* make sure that we use appropriate compiler

* reorganized CI files

* merged scripts into one