Update the landing page with all the logos of associated institutions

[gcanasherrera]

• add logos from @itutusaus @martincrocce @CarmelitaCarbone and others (@itutusaus to collect what must be included)
• add logo from NWO
• add grants acknowledgements (@itutusaus to collect them)

[gcanasherrera]

@raphkou could you coordinate with Isaac and take care of this eventually? Thanks