BUG: Because of Windows registry madness, we could not find the redistributables directory on Win64 builds... Add a search directory based on devenv (CMAKE_MAKE_PROGRAM) location so we can find it despite the madness.

CMAKE_MINIMUM_REQUIRED(VERSION), because the cmake they are shipped with is
always ok. Additionally, if a Find-module does CMAKE_MINIMUM_REQUIRED(), it
changes the policies as they may be set up by the project. So this shouldn't
be done in a Find-module (or surrounded by policy-push/pop commands)

Alex

executing a ctest script so the search paths are fully set up and variables
like CMAKE_SYSTEM are available. This is useful e.g. for new-style ctest
scripting.
(these files are also loaded on startup by cpack, so now they behave
similar).
Hmmm, maybe they should be also loaded by cmake -P ?

Alex