Conditionally show more metric details (#167)

- Collect and report subTimes like subScores
- Only show times if the global .details CSS class is set (the default view is unaffected)
- Also use .details for displaying displayCategoryScores
- Change uiFriendlyDuration to only report 2 significant digits
- Add Benchmark.prototype.wallTime accessor and report that as well
- Format command line output and align times and scores better
-  Use pts as unit symbol for console printing

Author: camillobruni

JetStream.css

@@ -348,6 +348,13 @@ a.button {
     scroll-margin-bottom: 20vh;
 }
 
+.benchmark .result.detail {
+    display: none;
+}
+.details .benchmark .result.detail {
+    display: inline-block;
+}
+
 .benchmark h4,
 .benchmark .result,
 .benchmark label,