add some rake tasks around gem pushing and stuff
add some rake tasks around gem pushing and stuff

rickypai/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,songling88/zookeeper,songling88/zookeeper,rickypai/zookeeper,songling88/zookeeper,songling88/zookeeper