update community page, add development page
update community page, add development page

haoch/kylin,haoch/kylin,murkrishn/incubator-kylin,murkrishn/incubator-kylin,murkrishn/incubator-kylin,murkrishn/incubator-kylin,haoch/kylin,haoch/kylin,haoch/kylin,lemire/incubator-kylin,haoch/kylin,lemire/incubator-kylin,lemire/incubator-kylin,lemire/incubator-kylin