Alliance tab in Statistics

[JumboShrimp]

It would be great if we could have a new tab in Statistics called alliance.

2 main components would be Alliance Rating and Alliance Score.

But Alliance Rating has a number of subcomponents, and each subcomponent could have its own rating of alliances.

Other possible rankings:
- World revenue
- World passenger revenue
- World cargo revenue
- North America revenue
- etc for all continents

- Alternatively, for the these above, market share % rather than overall revenue would be even better measure than say revenue in dollars

And on a different subject, the while the airports have market shares per airlines, additional market shares per alliance would also be useful (for pax and cargo).