CP013: Stalled!

[hcedwar]

@AerialMantis (cc: @Ruyk)
We are stalled on D0796r2 waiting for you to weigh in with reviews on pull request #52 and others.

[AerialMantis]

We have finished reviewing #52. The blocker from our side is the removal of the explicit execution context interface, which we feel should be there, at least as a stub which can be defined later on.