remove example library code (use nupkg instead)

[janusw]

The sample project in this repo includes an example browser, which is based on the example library at https://github.com/oxyplot/oxyplot/tree/develop/Source/Examples/ExampleLibrary. However the example-library code has been copied into this repository, which is not a good idea IMHO (it is outdated already and does not include the latest samples, and this will get worse over time).

Therefore this PR removes the ExampleLibrary code from the repository and uses the corresponding nupkg instead. For this to work I had to revert one commit (efee33c) by @iniceice88, which made some modifications to the ExampleLibrary (exposing ExampleInfo.Example and making ExampleInfo.Example.Controller settable). These modifications could either be upstreamed into https://github.com/oxyplot/oxyplot, or they could alternatively be included as a custom sample that is not part of the example library.

@iniceice88 Is this PR ok with you?

[iniceice88]

It's okay with me to use "nupkg" instead,

Actually, we do not have to set OxyPlot.Example.Controller, instead we can create custom PlotController in PlotViewPage.xaml.cs

/* PlotViewPage.xaml.cs PlotViewPage_Loaded event */

//if (ExampleInfo.PlotController != null)
//{
//    PlotView.Controller = ExampleInfo.PlotController;
//}

// make the annotation tooltip work
if (ExampleInfo.PlotController == null && ExampleInfo.Tags.Contains("Annotations"))
{
    PlotView.Controller = CreateAnnotationTrackController();
}
else
{
    PlotView.Controller = ExampleInfo.PlotController;
}

[janusw]

It's okay with me to use "nupkg" instead,

Thanks for the feedback!

Actually, we do not have to set OxyPlot.Example.Controller, instead we can create custom PlotController in PlotViewPage.xaml.cs

Very good point, that is even better than the options that I listed.

[janusw]

Actually, we do not have to set OxyPlot.Example.Controller, instead we can create custom PlotController in PlotViewPage.xaml.cs

Very good point, that is even better than the options that I listed.

I have added this in e44e2db, and verified that the tool tips in the sample "Annotations - Tool tips" work again (on Windows).