Use different defaults for different architectures to avoid integer o…

[andrewstucki]

Fixes #4 by specifying two different aggregation counts, 1 for 32 bit platforms, one for 64 bit.

[a8m]

Hey @andrewstucki, thanks for your contribution.
I'm not sure I want to add these extra files just for one variable. What do you think about adding something like this:

var maxAggregationCount = math.MaxInt32
if strconv.IntSize == 64 {
  maxAggregationCount = math.MaxUint32
}

Update: my other suggestion is to just set it to math.MaxInt32 and add an explanation in the comment above (see the current comment).

[a8m]

Any update on this @andrewstucki?

[magiconair]

Any progress here. this is still broken on 32 bit platforms.