Squashed 'CMakeModules/' changes from e83ac80..2979d55

2979d55 Fix install when version string is empty.

git-subtree-dir: CMakeModules
git-subtree-split: 2979d55e3ab903070e022c1154acd1a4cf4517e0
Merge commit 'f5461a35e5980936005d2f06021953b0918147d9'
Removes unneeded Config.cmake.in files.