Move to new package datasets defintions

[cofinoa]

@jbedia to allow more frecuente update versions of new datasets, dictionaries or vocabularies, it would be worth to to move all of them to a new R package?.

That is the primary objective, but a secondary objective would be also to create a mechanism where it's possible to point a branch/commit/release/directory/url ... of the datasets, dictionaries and vocabularies exist?. For example for a devel branch where new datasets could be tested before release them?