0 A.D. currently uses the term "Italiote" [sic]. It's best to use precise language:
* **Italic** refers to a branch of Indo-European and the peoples that speak it (cf. Celtic).
* **Italian** refers to the modern language, descendant from Latin, the people that speak it, and their country (cf. Romanian).
* **Italiot** (from Ἰταλιώτης) refers to Greeks living in Italy (cf. Cypriot).
From the context it's clear what 0 A.D. actually means (Samnites etc.) is //Italic//.
This patch therefore:
* Corrects the art file names.
* Also renames the other embassy icons for consistency (cf. D2551).
* Corrects the embassy template file name.
* Adjusts the affected templates, AI, and map file.
* Deletes the unused Celt, Iberian, Italian classes.
* Updates the embassy template tooltips (cf. D2578) and `cart.json` civ file entries.
* Orders the <Identity> node in the templates as specified in `Identity.js`.