Create a meta-port for CMake to make it easier for the end user and to better handle migration of build frameworks for dependencies
This pushes devel/cmake into /devel/cmake-core and splits manpages to /devel/cmake-man.
This also detaches CMake "core" itself via its manpages from sphinx and dependencies of sphinx
Poudriere OK (13.0 i386, clean package repo) with all options enabled in devel/cmake (meta-port)