该文件主要用于在overlay网络上进行仿真实验。-network simulated

实现P2P指定文件夹下的动态同步功能，支持新加入文件同步，不支持删除文件同步-when a peer establish a TCP connection with another peer, both of them will compare the lists of files they possess(assume that these shared files are stored in a designated folder in each peer), and proceed to