modq - generic module for CALICE data acquisition

concept:
- combining CALICE DAQ (at first Si and Sc)
- connectivity to generic experiment-wide DAQ frameworks (eg. EUDAQ/xDAQ)
    but not heavily dependent on those (just implementing adapters)
- minimal feature for standalone execution (mainly for debug purpose)
- simple and easy to understand
- C++ (for convenience of younger physicists, and me,
	  and esp. better for structural programming
	  for multi-people development)
- open (everyone can contribute via open git repository)
- also for debugging (sending single command etc.)
- GUI is not included (implemented outside)

structure (classes)
[all in modq namespace]

- DaqManager(? if needed)
- DaqBase (acq. thread, message transfer, based on file descriptor)
  - DaqSiLda (LDA connection establishment, specific treatment of raw sockets)
  - DaqUsb (USB connection)
  - DaqScLda (TCP connection?)
- PacketBase (general interface for translating command and data to string)
  - PacketSiLda (LDA header holder, can include PacketDif)
  - PacketUsb
  - PacketScLda
  - PacketDif (DIF header, common to Si and Sc)
- LogManager (generic log interface, providing C++ streams for logging)
- LogBase
  - LogSimple (store to a simple file)
  - LogEudaq?
  - etc.
- Exception (treating exception)
- Tool classes
  - RawSocket
  - MacAddress

--- Followings are not well considered ---
- ComManager (main thread, treating command communication from user/DAQ)
- ComBase
  - ComXml (assures CALICE connectivity)
  - ComEudaq
  - ComSimple
  - etc.
- DataManager (for data transfer/processor)
- ProcessorBase
  - ProcessorRawFile (storing data to raw file, compatible to calicoes raw)
  - ProcessorLcio
  - ProcessorEudaq (sending data via tcp to data collector in Eudaq)
  - ProcessorMonitoring (?)