Add an Overview of a Profile's Identifications

[bugbaer]

I think the point is that if you are trying to find someone to ask for help with identifications, looking at where they make observations and what those observations are of does not make it easy to tell what they have experience identifying. And the Identifications tab currently doesn’t make it easy to get a summary of what people identify the same way the Observations tab does. So there is no easy way to realize that, for example, someone mainly observes plants in a small geographic area but also makes lots of bird identifications at a continental scale.