Issue 48: Add share links

Reported by Sidath Senanayake, Oct 27, 2009

Makes it easier for people to share a link to the page as well as 
post to social networks:

http://twitter.com/home?status=<text>
http://www.facebook.com/sharer.php?u=<url>&t=<text>
http://www.stumbleupon.com/submit?url=<url>&title=<text&
gt;
http://del.icio.us/post?url=<url>&title=<text>
http://digg.com/submit?phase=2&url=<url>&title=<text
>

Also show the link to the page that can be easily copied.

Add a note to say that some photos might be visible if logged in.

Comment 1 by Sidath Senanayake, Feb 16, 2010

Social media links are implemented, need to add in link to current 
page, with j.mp/bit.ly URL compression if possible.

Fluidr