* Update ncrunch config.
* Tidy up reflection and multi-binding APIs:
- Move `BindingBase` and `MultiBinding` into Avalonia.Base
- `BindingBase` becomes a true base class for all bindings, and contains only the `Instance` method
- Properties common between reflection and compiled bindings are moved into `StandardBindingBase`
- `Binding` is moved to Avalonia.Base and renamed to `ReflectionBinding`
- A compatibility shim for `Binding` remains in Avalonia.Markup
- Remove `IBinding` and `IBinding2`
- Remove `ITreeDataTemplate's usage of `InstancedBinding`
- Remove `NativeMenuBarPresenter`s usage of `InstancedBinding`
- Remove `InstancedBinding` as it is now unused
This required an update to the DataGrid submodule: cell data validation has been temporarily removed as this used `InstancedBinding`.
* `Instance()` => `CreateInstance()`.
The use of "Instance" as a verb is quite unusual apparently ;)
* Seal classes where appropriate.
* Seal classes where appropriate.
* Remove `StandardBindingBase`.
Simply duplicate the members in reflection and compiled binding classes.
* Delete deleted submodule directory.
* Add missing attribute.
Fixes compile error.
* Fix reference to removed class.
* Update suppressions.
Steven Kirk
f2fc8d02f4