std::tr1::function模板类 std::tr1::bind()模板函数

1. http://www.cnblogs.com/stephen-liu74/archive/2012/08/12/2635583.html
2. http://blog.youkuaiyun.com/chopin407/article/details/7824499
3. http://blog.youkuaiyun.com/ozwarld/article/details/7279696