The first step of "agent" has almost completed ,just achieve the basic

function of agent.
Primarily rewrite my agent code refer to seniors' code,achieve the simple communication between the client and server.The next step is to achieve that the server can accepts task flows and then deal with fork and exec.

这个地方是我帮忙改的，即将gflags和glog的顺序调了下位置。因为没调之前，编译的时候tools/master_client会出错，错误信息显示glog依赖的一些gflags API　“reference undefined”。调换位置就好了。
我查了下，被依赖的库要写在后面。奇怪的是只有这一个目录tools/master_client有个问题，仔细核对代码也没有找到与其它是用glog的地方有何不同。