This version contains some minor updates and corrections.

This version is available at: https://viz-beta.cds.unistra.fr

A new version containing some cosmetic adding:

• add links to Simbad, Aladin, CDSportal in page 5

• add a link to the new CDS Xmatch service to cross catalogs

• redirect the page to the ReadMe file when catalog is not ready

• improve the catalogs statistics method

• fix bug for PostgreSQL installation to display large catalogs in a cone search