An simple nrpl for nim

[codic12]

Compiles with latest devel and works fine (used gc:orc). I can't use the FFI 
compilation though: 
    
    
    /home/user/.choosenim/toolchains/nim-#devel/compiler/evalffi.nim(14, 11) 
Error: cannot open file: pkg/libffi
    
    
    Run