[CMake] debug/release subdirs in visual studio projects

[Christian Verbeek]

> I would like a consistent behaviour among different build system :p Meaning same built tree, regardless of what you built with...

This is the main point I guess. Consistent and configurable.

My workaround will be not to depend on the filesystem structur, but to
store the path to my plugins and other resources like translations in
the windows registry or in /etc/myconfig. Possible that this is the best
way doing it anyway.