Clean and optimize clouds.cpp enough to not really contain any of the small amount of non-LGPLv2/later code left

Switch the license to be LGPLv2/later, with small parts still remaining as GPLv2/later, by agreement of major contributors

Defaults modified from original: alpha=200, key=F10

Update /README.txt, remove duplicate /doc/README.txt and update CMakeLists.txt to package /README.txt

german translation file
and bashscript to update translations

german translation file
and bashscript to update translations

CMake working nicely on Windows, at least with MSVC. "Compiling on windows" section in README.txt updated.