Ancient Robots: Fix references in loc files

[tzerrell]

The english localisation file for the Ancient Robots event does not have appropriate references; instead it contains summary explanations like [planet_name] and [scientist_name]. These need to be set up with the correct references.

[tzerrell]

I'm assigning this issue to @Tuttu since it's a part of #79 which he's working on.

[Tuttu]

No problem. :)

[Elimdur]

Planet name is not shown in the first event text

[tzerrell]

This seems like it is likely resolved so I'm closing it, but reopen if it's still an issue.