Format README.md
Format README.md

mbrukman/xmemcached,bmahe/xmemcached,mbrukman/xmemcached,XHidamariSketchX/xmemcached,bmahe/xmemcached,springning/xmemcached,fengshao0907/xmemcached,killme2008/xmemcached,killme2008/xmemcached,XHidamariSketchX/xmemcached,fengshao0907/xmemcached,springning/xmemcached