Entry page numbers

Same as genesys-pgr/genesys-ui#57 (closed) (but different project).

genesys-pgr/genesys-server#330 (closed) adds information about number of accessions, datasets, etc to the /api/v1/info call.

1. Update ApiInfo model
2. Use this information to render correct numbers for "Accession records", "Subsets", "Datasets", "Insitutes" on the entry page http://genesys.demo.genesys-pgr.org/