Adding BaseJsonNode, making it (and all concrete sub-classes) JsonSerializable

diff --git a/src/perf/TestJsonPerf.java b/src/perf/TestJsonPerf.java
index 85dddd5..229cfa2 100644
--- a/src/perf/TestJsonPerf.java
+++ b/src/perf/TestJsonPerf.java
@@ -56,6 +56,7 @@
             boolean lf = (round == 0);
 
             switch (round) {
+
             case 0:
                 msg = "Jackson, stream/byte";
                 sum += testJacksonStream(REPS, true);