Formalize the use cases in a use case document

[mrpatrickwest]

On the page http://wiki.esipfed.org/index.php/ToolMatch there is a section for Use Case, but it's not really a use case. It's a generalized feature that we would like to have on the site.

We need to formalize a use case document for both of our use cases and add the information to a use case page at the site under about.