Flickr sync should save avatars

[Christopher Adams]

It is possible to get user avatars from the Flickr API.

http://www.flickr.com/services/api/misc.buddyicons.html

>Every flickr user has a 48x48 pixel buddyicon used to represent themselves.

>You can construct the url of a buddyicon once you know the user's NSID, icon server and icon farm, as returned by many api methods.

>If the icon server is greater than zero, the url takes the following format:
>http://farm{icon-farm}.static.flickr.com/{icon-server}/buddyicons/{nsid}.jpg

>else the following url should be used:
>http://www.flickr.com/images/buddyicon.jpg