added link to wiki

[Install gitwatch as a service on Debian with supervisord.](https://github.com/nevik/gitwatch/wiki/gitwatch-as-a-service-on-Debian-with-supervisord).
Merge pull request #22 from @egidijus
Add section and fix link title for supervisord article
Enable/disable append `git status --short` to commit message.
Fix exclude regex (\.git).
Merge branch 'master_fix_regex'
Merge branch 'master_append_status'