Merge branch 'upstream' into develop
Fix selection shading

The class needs to include mentions of selected/notselected, if applicable.
The name needs to not contain any spaces, to select the right items.

The result is that we can select items and have them colour appropriately,
and still have the scatter chart animate to position.
Fix TextMeasurer docs

We were still generating docs for MarginMeasurer, which no longer exists
Use more strict selection of points

The "self.name + 'class'" was trying to duplicate the seriesClassName
without the concat'd classes.

We now factor out this shorter name to code we can call from PointSeries
to find new data points.
Remove TextMeasurer from docs
Merge pull request #172 from tpkelly/develop

Fix selection shading