gengo/goship — pull request #117 by ksk-uchi (2014-07-11 06:38:46+00:00)
Title: update about pem file for option -k

I wrote how to convert rsa file to pem format.
Because when I try to use id_rsa file which made by ssh-keygen command, goship.go output below error.
```
Error: asn1: structure error: length too large
```