SENTRY-843: Add the link of wiki page in README.md ( Guoquan Shen, Reviewed by: Colin Ma)
SENTRY-843: Add the link of wiki page in README.md ( Guoquan Shen, Reviewed by: Colin Ma)

apache/incubator-sentry,intel-hadoop/incubator-sentry,joshuayao/incubator-sentry,joshuayao/incubator-sentry,sundapeng/incubator-sentry,shenguoquan/incubator-sentry,sundapeng/incubator-sentry,apache/incubator-sentry,intel-hadoop/incubator-sentry,intel-hadoop/incubator-sentry,apache/incubator-sentry,sundapeng/incubator-sentry,shenguoquan/incubator-sentry,sundapeng/incubator-sentry,intel-hadoop/incubator-sentry,joshuayao/incubator-sentry,shenguoquan/incubator-sentry,sundapeng/incubator-sentry,shenguoquan/incubator-sentry,joshuayao/incubator-sentry,apache/incubator-sentry,intel-hadoop/incubator-sentry,joshuayao/incubator-sentry,shenguoquan/incubator-sentry,apache/incubator-sentry