removed old files and started to copy already 37-ized code into the work-in-progress repo.
added apps folder. does not seem to need any changes.
added CMake FindModule scripts.
included reciprocal_ff. build works, test passes (just a dummy)
modified top level CMakeLists.txt to search for the additional dependencies, added include and linker paths,...
added pad_vector. build works, test passes (dummy test).
added stream_to_vector_overlap. build works, test passes (dummy test)