Counting authors for the already existing criteria: admin / experto / normal / all
Looking for new authors on Estadistica
having "nuevos" before TOTAL was misguiding, because it seemed that adding all the groups will give the total, while in fact nuevos were already on one of the other groups (so they were counted twice).

"nuevos" after TOTAL signals that TOTAL includes all the other rows, not nuevos
Merge pull request #8 from Soluciones/counting-how-many-different-authors

Counting how many different authors