Naufrago 0.4 released

Plus to the 0.4 roadmap, the following has also been added:

- FIX: Items of some feeds were shown as an exceprt, now show complete.
- NEW: Proxy funcionality integrated (thanks Niels).
- FIX: Added an alternative way to retrieve feed favicons.
- IMPROVED: X button minimizes to tray instead of quitting.

Hope you enjoy!