* implemented both hardware (runtime) logging and constructor logging
  (compile time)
* mix-in trait Logging provides methods info, warn and error (and cinfo,
  cwarn, cerror resp. for constructor logging)
* logging level is controlled by implicit Logging.Level, determined at
  each call, allows for selective logging

* caused by parallel execution of suites (apparently Chisel does
  not like that)
* fixed by deactivating parallel and forked executions

* testing utility: provides fixed data via Decoupled
* configurable with/without wrap-around
* unit tests