New ECAL Unpacker code , off in sequences for the time being

New Ecalunpacker module from Philippe Gras. Not used in standard sequences for this PR. We plan to activate it at a later time.
If the debug is to be needed frequently, switch to edm::LogPrint instead of cout,
if fairly rarely, use LogTrace or LogDebug (it will not be compiled in this case, unless an extra switch is set)