Have the bootstrap script indicate network status in exit code.

Also, don't hang on a tail -F.

tools/bootstrap-network.sh

@@ -37,4 +37,5 @@ for file in net/nodes/*a/torrc; do
 done
 
 $CHUTNEY start networks/$flavour
-tail -F net/nodes/*/notice.log
+$CHUTNEY status networks/$flavour
+#echo "tail -F net/nodes/*/notice.log"