* previous implementation was not capable of handling a continuous
  stream of data (continuity must be preserved to avoid congestion)
* new implementation fixes this and several other minor issues
* better unit test: now using inverted pairs of DWCs
* makes testing code much simpler and data/waves easier to check
* added additional tests to specify the required timing behavior
  (i.e., preserving continuous data streams)

* separate package for SignalGenerator can be removed
* unit test included

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

* each suite now has a subdir
* each test has subdir within suite dir

* upsizing mode (inWidth < outWidth) implemented
* added unit test support for upsizing

* basic Decoupled-based data width converter
* currently only downsizing implemented with endianess selector
* works, but performance is lackluster yet
* unit tests cover several interesting combinations in both endianesses

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