disruptorCpp-IPC for arbitrary length of data

slightly modified version of disruptorCpp-IPC

compile

mkdir build; cd build; cmake ..; make

inter thread test

cd build/tests/inter_thread 
./inter_thread_test 

inter process test

cd build/tests/inter_process 

# whenever you change number of cunsumer, producer or memory size, 
# clear shared memory first using ipcrm.
# ex) ipcrm -M 0x000e1740
#     ipcrm -M 0x0001e240

# run 2 consumer, then 1 producer 
./consumer 0 
./consumer 1
./producer
# make sure reset shared memory running 'ipcrm -M your_shmkey' 
# if you have changed buffer size or number of producers/consumers.