ExpectoConfig: add C# compatible With* methods / Logging: add Task based Interface

[0x53A]

As the C# sample project shows, it is already possible without too much fuzz to define Tests in C#.

But without the F# with expression, it is actually pretty hard to update the config.

This adds .With* methods, and also adds a way for C# code to define a Printer.

[haf]

Minor fix @0x53A before merge — but I think we can merge this with that change.

[AnthonyLloyd]

@0x53A @haf it still needs to be moved to CSharp namespace.

[0x53A]

I'll fix the async issue - good catch, thank you.

Which parts should be moved to the CSharp namespace? Just the interface? Or should I also move the with* methods to extension methods and the CSharp namespace?

I'll do it tomorrow, because I currently don't have internet at home.

[AnthonyLloyd]

@0x53A Everything that is in Expecto.fs. I think it can all be extention methods. Thanks

[0x53A]

Ok the two should be done.

Can you please take a look again?

Thank you both.

[AnthonyLloyd]

Thank you very much!