ReactiveTableViewSource: Add support for section headers & footers
ReactiveTableViewSource: Remove #regions added by 30d596b.
Merge pull request #386 from meteficha/tablesections

ReactiveTableViewSource: Add support for section headers & footers (fixes #385)
Remove unnecessary build platforms. Fixes #330
Merge pull request #387 from pH-minamo/master

Remove unnecessary build platforms. Fixes #330
ReactiveTableViewSource: Add hook to RowSelected method.
Remove unnecessary documentation.
RowSelectedObservable returns selected cells.
ElementSelected returns actual ReactiveTableSource element.
hwhoops
1) For me it makes more sense to return latest registered implementation of a service
2) Actually this is consistent with the way ModernDependencyResolver works (https://github.com/reactiveui/ReactiveUI/blob/42e580f9d10db4e32c827273e57d0ac997421d86/ReactiveUI/ModernDependencyResolver.cs#L49)
Merge pull request #389 from journeyman/func-ioc-get-service-fix

Fix for GetService() implementation of FuncDependencyResolver
Add a test to verify change tracking applies to AddRange'd items
Prevent multiple evaluation of the IEnumerable in ReactiveList.AddRange. Fixes #392.
Merge pull request #393 from reactiveui/change-tracking-addrange

Prevent multiple evaluation of the IEnumerable in ReactiveList.AddRange
Fix to ObservableAsyncMRUCache where a call to a release function could block if the key in the cache was evicted while still in flight.
Use subscribe instead of await
Added ViewModelViewHost for Winforms
* Added RoutedViewHost for Winforms + tests
* Added RxApp.DefaultExceptionhandler to ViewModelViewHost
Cosmetics