Minor Changes

• Handles Array types by recursively passing Array entires thru flat-obj

  This changes the following behavior, which was considered a bug:

  var obj = {
    foo: 123,
    bar: [
      { a:{ b:1 } },
      { a:{ b:2 } },
      { a:{ b:3 } }
    ]
  };
  
  // before:
  var output = {
    foo: 123,
    bar_0_a_b: 1,
    bar_1_a_b: 2,
    bar_2_a_b: 3
  };
  
  // now:
  var output = {
    foo: 123,
    bar: [
      { a_b: 1 },
      { a_b: 2 },
      { a_b: 3 }
    ]
  };