code: function flush(moveobj, withobj, axis, mside, wside) {
    return moveobj.translate(
      util.calcFlush(moveobj, withobj, axis, mside, wside)
    );
  }
docs: Moves an object flush with another object
  @param  {CSG} moveobj Object to move
  @param  {CSG} withobj Object to make flush with
  @param  {String} axis    Which axis: 'x', 'y', 'z'
  @param  {Number} mside   0 or 1
  @param  {Number} wside   0 or 1
  @return {CSG}         [description]