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
new fields needed to distinguish between who starts the conversation and who follows, and to know if we're on blogs
The main app must tell us which values of "subtipo_id" belongs to foros
New factories needed for testing foros and blogs
Added all the KPIs from blogs & foros
Test refactor -> moving logic to the factories
Refactor DRY of clase contenido on contenido_spec
fucking spaces removed
Merge pull request #8 from Soluciones/counting-how-many-different-authors

Counting how many different authors
@ayosec : "For every configuration item in the engine, I think that it is a good idea to have a default value"
Merge pull request #9 from Soluciones/foros-and-blogs

Foros and blogs
Merge branch 'counting-how-many-different-authors' into decoupling-from-classes
Merge branch 'decoupling-from-classes'