VisualMelon

Linking #111

@Jonarw we seem to have mostly got through the outstanding PRs, so naturally I feel compelled to open some more. Worth providing a polygon series if we can come up...

There is an easy workaround via the `ScatterSeries.Mapping` property. You can also effectively use a `LineSeries` for a scatter plot, as you can make the line transparent in a line-series...

The `ScatterPlot.Mapping` property is a `Func`, see the relevant code in [`ScatterSeries{T}.UpdateItemsSourcePoints`](https://github.com/oxyplot/oxyplot/blob/develop/Source/OxyPlot/Series/ScatterSeries%7BT%7D.cs#L808-L820), so there is no reflection; though, there is inevitably some casting to be done. Reflection is only used...

@Vision1224 it has not been resolved. I don't think we can add defaults for the cursors by way of attributes because they are not not constants, but there may be...

Sure; when you have something you're happy with, can link your branch here or open a PR and go from there. That said, changing the base class is probably a...

I would support Option A - and don't see any issue with the package/project not directly matching the namespace - but I think the benefit would be negligible. I'm not...

@oxyplot/admins does this API look OK? Not wild about `ChangeOpacity` now that I look at it again, but can remove that and keep the other changes otherwise. Any preference between...

Looking at this quickly now, I'm tempted again by `TextBorderStroke` and `TextBorderThickness`, leaving everything else as is. If that's agreeable, then I'll make that change and I think we should...

Then I don't like `TextBackgroundPadding`... I think `TextBorderBackground` is OK, so I've changed to `Border` everything (rather than `TextBackground` and rebased. I don't know if you're convinced by the new...