cmake AsciiDoctor examples

Warzone2100/warzone2100 doc/CMakeLists.txt :53 

find_package(Asciidoctor 1.5.3)

zeromq/libzmq CMakeLists.txt :798 

find_package(AsciiDoctor)

feelpp/feelpp feelpp/cmake/modules/feelpp.adoc.cmake :25 

Find_Package(Asciidoctor)