Provide an overview of Analysis ticket results for researchers

peer came up with a list of analysis ticket results and asks in legacy/trac#7241 (moved):

How are the blurbs at doc/AnalysisTicketResults (for metrics-tasks)? Were any tickets misinterpreted?

Looks great! I didn't read all descriptions in detail, but I think it's a good start for people, and if something is wrong, they can always fix it.

A few ideas:

• Should tickets be listed in descending order, from newest to oldest?
• Should we add a header saying that code for most of the tickets is available in the metrics-tasks.git repository?
• Should we link to this wiki page from http://research.torproject.org/index.html, in particular in the "We're building a repository of tools" part, and throw out the link to the tools.html page?