Add terse version 2 output format

Default is the new format, but allow a user to set version 2 for
easier backwards compatability with older scripts.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/README b/README
index 26b5909..d41fc66 100644
--- a/README
+++ b/README
@@ -137,7 +137,7 @@
 	--bandwidth-log		Generate per-job bandwidth logs
 	--minimal		Minimal (terse) output
 	--version		Print version info and exit
-	--terse-version=type	Terse version output format
+	--terse-version=type	Terse version output format (default 3, or 2).
 	--help			Print this page
 	--cmdhelp=cmd		Print command help, "all" for all of them
 	--showcmd		Turn a job file into command line options