lib/console.js
function writelnColor(){
        for(var i=0; i<arguments.length; i=i+2)
            grunt.log.write(arguments[i][arguments[i+1]]);
        grunt.log.writeln('');
    }
function writelnColor(){
        for(var i=0; i<arguments.length; i=i+2)
            grunt.log.write(arguments[i][arguments[i+1]]);
        grunt.log.writeln('');
    }
writelnColor(msg, color, mgs2, color2,..,msgN, colorN) writeln msg in color