Calculates solutions for the n-Queens problem for different board sizes, which
can be given as a list of intervals on the command line.

Example calls:
    clingo incqueens.lp incqueens-py.lp -c calls="list((1,1),(3,5),(8,9))"
    clingo incqueens.lp incqueens-lua.lp -c calls="list((1,1),(3,5),(8,9))"

