[PATCH 0/7] MR906: msvcr: Implement _StructuredTaskCollection::_RunAndWait and the constructor

[Torge Matthies (＠tmatthies)]

This implements the _RunAndWait member function and the constructor of the _StructuredTaskCollection, which enables the tests for that class to run.  
Also adds a throw of a missing_wait exception to the destructor when chores are scheduled and _RunAndWait was not called.

Remaining stuff after this:
- Task collection cancelling + IsCancelling function (next MR)
- Cancellation token support (requires RE'ing the _CancellationTokenState class, currently in progress)