E2e rx age

Closes https://github.com/rackerlabs/encore-ui/issues/319
The point that @klamping made about the disk size PR is also relevant here. If we want `toMoment` as explicit functionality for the page object, this is fine, but otherwise this much logic in the tests is giving us a chance to introduce errors. The important test above is the `expect(onPage).to.equal(testData);`, as it's testing the output of the filter