Unit Tests - benchmark2

- Fixed Timer class to use a fixed precision, that for some reason,
  does not work on Haiku.  Put a conditional compile around it for
  now - perhaps later Haiku alpha releases will change things?
- Added benchmark2.t, which enables high-resolution timers for a
  single 'list' command, with 10, 100 and 1000 task databases. Then
  it emits readily-found and parsed data for charts.
- Eliminated obsolete benchmark data for hardware I no longer own.

src/Timer.cpp

@@ -52,7 +52,12 @@ Timer::~Timer ()
     << mDescription
     << " "
     << std::setprecision (6)
-//    << std::fixed
+
+#ifndef HAIKU
+    // Haiku fails on this - don't know why.
+    << std::fixed
+#endif
+
     << ((end.tv_sec - mStart.tv_sec) + ((end.tv_usec - mStart.tv_usec )
        / 1000000.0))
     << " sec";