Metrics association with users

With DC-258 and optionally DC-87 it would be very very cool and also useful to be able to match metrics evolution to users/changesets.

For example, I could, for a given project, choose to see the "aslak" view of the project. It would show me How I have influenced various metrics over time, such as:

o Code coverage (Clover)
o LOC (Clover, others)
o Ashcroft logs (Ashcroft can log instead of fail)
o Build failures
o Test execution time

etc etc.

This should probably be implemented as a Pebbles component, possibly leveraging alternative graphing engines - Gnuplot by default because it is easily available on both linux and cygwin - but alternatively nicer engines like the many java ones out there.

There should also be one metric view per project where you can see how the entire team has influenced the evolution of a particular metric.

Giving this hi pri because it is a killer feature