Removed some printing to console.
Implemented "orderting" option of a process. If set ("ordering": "true"), the process will emit output signals in order (relevant for processess with parlevel).
The Sqrsum example now demonstrates "parlevel" and "ordering". Squares are
produced in parallel with random delay. However, when "ordering" is set,
they will be emitted in the correct order.
AppEngine workflow moved to "examples".