- added option nokey for pkcs12 to avoid exporting private keys
- added command export-p7 to export certs using pkcs7 format.
- removed unecessary arg check in export_pkcs func
- Changed expanded tabs (spaces) to normal tabs
- fixed pkcs12 nokey message
- changed export dir for pkcs7 to issued
Modify error message from export_pkcs() to avoid console wrapping

Signed-off-by: Josh Cepek <josh.cepek@usa.net>
Merge PKCS#7 feature from pull req #14

This adds export support for PKCS#7 bundles, and adds the option to
export PKCS#12 without private keys

Author: Luiz Angelo Daros de Luca <luizluca@tre-sc.gov.br>
Signed-off-by: Josh Cepek <josh.cepek@usa.net>