[trean] Open links in new windows

[Chuck Hagenbuch]

Quoting Hubert Yeh <cwyeh@pest.yichi.org>:

> I have just made some minor changes in templates files in order to make
> users can choose to open their bookmark links in new windows or not. I'm
> afraid my changes might break the coding style of Mike's. Anyway, enjoys
> it if you need that. :)

Cleaned up and committed, thanks,

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
"People ask me all the time what it will be like living without otters."
 - Google, thanks to Harpers