- add 'new' command to add a new advisory
- add 'list' command to list advisories
- add 'show' command to show an advisory

Version 0.4

- advisory.{html,txt}: don't add a CVE line when there is no CVE

Version 0.3

- add file tmpl/CVE.html, missed in previous version

Version 0.2

- add advisories html pages
- add advisories pages by CVE, release, source package
- add CVE list page

Version 0.1

- first version