using new thread synchronization
Disabled further tests, making one after another working.
Some notes:
* currently running this leads to different outcomes on differnt runs,
there are some races/unsyncronized things left, to be investigated.
* I suggest to make Subsystems joinable, this prolly needs some work in
the error handling department (thread-wrapper.hpp too)
* using nonrecursive/waitable lock, recursive locks are have some bad
taste unless absolutely necessary
* after all a timed lock with polling is not the right approach to check
for subsystem shutdowns, I opted against thread cancelation because of
its programming overhead and complexity. We may refine this and allow
synchronous cancellation (with an approbiate thread flag) in some cases.
- clarify the meaning of run(true), run(fail), run(throw)
- do a real handshake between start() and the subsystem thread
- avoid accessing the SubsystenRunner after signalling termination
