Display some high level site metrics on the home page

[kapilharesh]

In the current header with the site tagline, there's been a proposal to support showing some real time numbers of the following metrics:

• Number of Stories submitted
• Number of different cities or postal codes with stories submitted.

e.g. XXX stories submitted across XX cities and XXX postal codes

It doesn't have to be a number that refreshes dynamically - but every time the page loads, it should pull the latest numbers.

For now this story is mainly to begin some mockups to visualize this feature.

[kapilharesh]

To clarify, this metrics should be shown maybe below the tagline itself.

[curtis-vdg]

Update to this

• Total number of stories submitted
• Total number of different postal codes OR cities