Remove default -N argument to stack executable.  Closes #680.
Remove default -N argument to stack executable.  Closes #680.

narrative/stack,supermario/stack,meiersi-11ce/stack,mathhun/stack,Fuuzetsu/stack,DanielG/stack,athanclark/stack,adinapoli/stack,AndrewRademacher/stack,achernyak/stack,MichielDerhaeg/stack,supermario/stack,adinapoli/stack,robstewart57/stack,tedkornish/stack,markus1189/stack,rekka/stack,juhp/stack,luigy/stack,deech/stack,keent/stack,fizruk/stack,ant1441/stack,markus1189/stack,akhileshs/stack,juhp/stack,fizruk/stack,Blaisorblade/stack,martin-kolinek/stack,rrnewton/stack,athanclark/stack,lukexi/stack,luigy/stack,rubik/stack,rekka/stack,duplode/stack,sinelaw/stack,vigoo/stack,bollu/stack,AndrewRademacher/stack,sjakobi/stack,cabrera/stack,Denommus/stack,bollu/stack,mrkkrp/stack,harendra-kumar/stack,mathhun/stack,Fuuzetsu/stack,harendra-kumar/stack,bixuanzju/stack,anton-dessiatov/stack,rrnewton/stack,lukexi/stack,joozek78/stack,chadbrewbaker/stack,rvion/stack,deech/stack,MaxGabriel/stack,kairuku/stack,AndreasPK/stack,ant1441/stack,achernyak/stack,martin-kolinek/stack,akhileshs/stack,chadbrewbaker/stack,mrkkrp/stack,Blaisorblade/stack,MaxGabriel/stack,Andrew-the-Ubergeek/stack,phadej/stack,DanielG/stack,duplode/stack,narrative/stack,Andrew-the-Ubergeek/stack,anton-dessiatov/stack,sjakobi/stack,MichielDerhaeg/stack,agrafix/stack,Denommus/stack,vigoo/stack,kairuku/stack,rubik/stack,phadej/stack,wolftune/stack,Heather/stack,wolftune/stack,agrafix/stack,Heather/stack,tedkornish/stack,bixuanzju/stack,keent/stack,joozek78/stack,AndreasPK/stack,cabrera/stack,sinelaw/stack,meiersi-11ce/stack,robstewart57/stack,rvion/stack