Add zk command for zk cli (#218)

diff --git a/bin/uno b/bin/uno
index fdc456a..8882286 100755
--- a/bin/uno
+++ b/bin/uno
@@ -33,6 +33,10 @@
     check_dirs ACCUMULO_HOME
     "$ACCUMULO_HOME"/bin/accumulo shell -u "$ACCUMULO_USER" -p "$ACCUMULO_PASSWORD" "${@:2}"
     ;;
+  zk)
+    check_dirs ZOOKEEPER_HOME 
+    "$ZOOKEEPER_HOME"/bin/zkCli.sh
+    ;;
   env)
     "$bin"/impl/print-env.sh "${@:2}"
     ;;
@@ -85,6 +89,7 @@
     echo "  stop  <component>      Stop Accumulo, Hadoop, ZooKeeper, if running."
     echo "  kill                   Kills all processes"
     echo "  ashell                 Runs the Accumulo shell"
+    echo "  zk                     Connects to ZooKeeper CLI"
     echo "  env                    Prints out shell configuration for PATH and common environment variables."
     echo "                         Add '--paths' or '--vars' command to limit what is printed."
     echo "  version <dep>          Prints out configured version for dependency"