Jeremy Wildfire

Update data framework for `chart.marks`

3

Make a copy of each mark group's raw data at `chart.marks[n].data.raw[]`. This is in addition to the copy already saved at `chart.marks[n].values.raw[]` (which can be removed in v2.0)

The `processed_data` parameter in `chart.draw()` is rarely used (and not at all tested). Leaving for backwards compatibility for now, but remove support in v2.0.

Add option for tick rotation

1

Custom implementations can be used here. See [here](https://github.com/RhoInc/safety-results-over-time/blob/master/src/util/adjust-ticks.js).