Fix init scripts to say SickGear

This is a new revision of PR #15 which had some lacking scripts.

The ubuntu init script has been removed and replaced with a link to the Debian init script. All init script have been modified to work with old settings where possible so that upgrading old scripts do not produce odd results. Eventually the backwards compatibility can be dropped.

The init scripts have been moved to a separate directory to clean up the root of the development tree.