GitLab

* first commit

* fix bug

* fix by commits

* fix by commit

* add funcs to IfElse

* fix bug

* fix bug

* fix bug

* change tab to space

* [optional] support protobuf

* fix windows/LightGBM.vcxproj

* add doc

* fix doc

* fix vs support (#2)

* fix vs support

* fix cmake

This reverts commit 53b99854.