Remove moment.js to improve bundle sizes

Hi,

We noticed that including `moment.js` (via `pond` and `react-timeseries-charts`) in our application added 500kb to the minified bundle.
This one library doubled the total size of our application and has a performance impact on page load times.

There is a [thread over at moment](https://github.com/moment/moment/issues/3376) discussing this issue.
At the bottom of the comments there are some alternatives suggested, which I can't comment on, but seem to be much smaller in size.

How tightly are `pond` / `react-timeseries-charts` coupled to the specifics of `moment.js`? would you consider using another library in order to remove half a meg from the builds?