integration with Claws-mail
Hello,

although I managed to integrate taskwarrior & cb-thunderlink (see #138), I've decided to explore integration with Claws-mail which is my beloved mail client...

My idea is to take advantage of `mutt2task` script from the [task-attach](https://github.com/alkim0/task-attach/blob/master/bin/mutt2task) project to be able to create `tw` task from within Claws-mail and then annotate the task by using something like:

```
claws-mail --select ~/.claws-mail/newscache/news.gmane.io/gmane.comp.tex.context/112779
```

which does work in the terminal, but wonder what would be required at the `taskopen` side to make such link open-able by it?

Sincerely
