config.DIR for rss-model.tpl + config.DIR in run.py + init.d script for debian

Hello,

After another try... here is my pull request : 
- config.DIR was missing for rss-model.tpl path
- Error message changed when rss-model.tpl is not found
- Use config.DIR for binary path in run.py + change of python's binary name
- A init.d script I made to daemonize the server (working on Debian).

Cheers.