This new implementation can be easily compiled and executed without the need for other components to be present.
It relies on standard C functions, aside from stat() which is part of POSIX but available on Windows as well.
There's only one third-party dependency, which is tinydir: a single-file header-only library for traversing directories.
Our CMake project used to forcefully create and use two different build directories: "build" and "tmp".
This commit changes the behavior so that only the build directory CMake is ran in is used.
The "configure" script now runs CMake in "build" by default, instead of "tmp".
