Place pages templates

![screen shot 2013-10-25 at 17 17 10](https://f.cloud.github.com/assets/22996/1409311/ec50808a-3d90-11e3-99a0-93f77c1279c0.png)

Each of the heading links are clickable to reveal the list of people in that category, the nav is now consistent with the people pages, and the sidebar (though not visible) should now be consistent as well.

@wrightmartin Can you step in and give this a lick of paint please? I'm not 100% sure about the layout of the constituency office tab, but if you can take a look perhaps it will become obvious what I need to do :)

Closes #779 
Closes #780 
Closes #892