[Pas2js] Async, AWait

[Michael Schnell]

Great !
I seem to remember that functions like that are available in Oxygen (inherited from C#) but supposedly with different names and usage conventions.
It would be great if the "Desktop fpc would have this, as well to allow for "asynchronous loops" (making use of multiple CPUs) and similar stuff, and if the Pascal dialects could allow for writing compatible code for all of them. 
-Michael