multi RingBuffer test ver0.4

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Succeeded in using multi thread
 >Collector writes massage to RingBuffer and
 >Builder reads from it.
 >Builder doesn't assemble the RingBuffers yet.
usage:
g++ -c RingBuffer.cpp -lpthread
g++ MultiRingBuf.cpp RingBuffer.
multi RingBuffer test ver0.4

Save this version as a reference
Succeeded in using multi thread
   >Collector writes massage to RingBuffer and
   >Builder reads from it.
   >Builder doesn't assemble the RingBuffers yet.
usage:
   g++ MultiRingBuf.cpp RingBuffer.cpp -lpthread