Celtic units names

[Elmetiacos]

Basically a lot of what I'm doing is ironing out small errors in spelling and grammar, and removing names in modern Irish or Welsh to be replaced by the actual forms considered to have been extant in the EBII period. Also, there has been a lot of new material come to light and subject to more focussed study on the Lusitanian language in the 10 years since EB began: it can't be regarded as some weird form of Celtic any more.