Promotes # of Requests to a more visible place in bucket#show

The number of requests made to the bucket is a useful information.

But it's only shown in the pagination, so I thought about promoting it to a more visible place.

wdyt?

![](http://f.cl.ly/items/2M0p1d130M1N3i120v2s/Screen%20Shot%202014-06-26%20at%2011.27.22%20AM.png)