updating README and sample startup script for the wrapper device
enable multi-message input and output in the WrapperDevice
added consistency check for output data references and handling of data references for forwarded blocks
bugfix in the preparation of output data sets, avoid the relocation of the vector array used as buffer
propagating verbosity level to device class and adding messages depending on verbosity
Merge branch 'dev' of https://github.com/AliceO2Group/AliceO2 into mt
Minor change in formatting