Improve stats pages

[valearna]

Add statistics on:

• added vs removed entities (find a way to show if entities are added, removed or confirmed)
• show author vs curator confirmed (maybe read validated data from abc - or the OA and GAF files? Curated data types in the caltech db will be transferred to the ateam db and in the future we'll have them in the abc. GO data can be fetched from the GAF files)
• who is doing the submissions? PIs vs other roles from the caltech db
• generate pdf certificates for authors on the curator portal with number of completed submissions
• for author confirmed data types, the word "confirmed" is confusing in the title, but it would be nice to visualize how many of these submissions were confirmed from extracted data and how many where false negative/positive
• expand stats to everything we have on the form