Add recently updated pages and recently indexed items to the dashboard, ...

...and move the dashboard to a resource route

![screen shot 2014-02-19 at 16 18 57](https://f.cloud.github.com/assets/111218/2213741/a152401a-99c4-11e3-9e39-589c57ca0e46.png)


I'm reusing the `catalog#admin` partials, so when they get edit/remove/public views, the dashboard will get them for free. (Edit links added in the 2nd commit here..)