Guile: update Makefile
add Ruby version
replace units.each with units.each_with_index
bug fixes
delete 'next' in 'each'
replace 'sort' with 'sort_by'
Ruby: don't strip too much; add executable perm
Guile: don't compile; result path is outside and platform-dependant
C++14: compute then print head line
C++: rename to C++
Go version; thanks to 小白
Go: minor changes