Decode the configuration file in UTF-8 mode.

This all started with this little pastebin below :-).

```
<Lynoure> I might be a bearer of difficult questions again.
<Lynoure> I tried to add this .taskrc fragment to inthe.am: http://pastebin.com/Fx6hcqJY
<Lynoure> and it claims it cannot save it.
```