Create addressbook.h
Create addressbook.cpp

AddressBook class
Create contact.h

Contact class:save information of single person
Create contact.cpp
Create server.h

Server class:server
Create server.cpp
Create cs.h

Communication is implemented by c socket at unix domain
Create cs.c
Create smakefile

makefile of creating server
Create client.h
Create client.cpp
Create cc.c

Communication is implemented by c socket at unix domain
Create cc.h
Create cmakefile

makefile of creating client
Create read.txt
Merge pull request #4 from shp2013/master

AB has c/s model