peek list classfication for every variants

[Zhuxitong]

Could peek subcommand list the type of every variants not just a summary text?

Besides, I installed the lastest version vt, but the peek shows no -o parameter:

$ ./vt --version
vt v0.57721
The MIT license
Copyright (c) 2013 Adrian Tan atks@umich.edu
$ ./vt peek
undefined -- Required argument missing: <in.vcf>
peek v0.5
description : Summarizes the variants in a VCF file
usage : vt peek [options] <in.vcf>
options : -y output pdf file [summary.pdf]
-x output latex directory []
-f filter expression []
-I file containing list of intervals []
-i intervals []
-r reference sequence fasta file []
-? displays help

However, from the offical website, I could see that there is -o:

options : -o output VCF file [-]
-I file containing list of intervals []
-i intervals []
-r reference sequence fasta file []
-- ignores the rest of the labeled arguments following this flag
-h displays help

Did I miss something?