OpenRA/OpenRA — pull request #4430 by reaperrr (2014-01-05 18:29:28+00:00)
Title: Divided system.yaml of all shipping mods into multiple yamls

As discussed in #4420.

I kept the 'system' at the beginning of the new files to make clear this is the previous system.yaml stuff and to group them together inside the rules folder.

Merged RA music yamls while I was at it, as there is little reason for 3 files in this case.