Reorganise RA-specific parts of Mods.RA a little more
Bring Mods.D2k in line with our new folder/namespace structure
Merge pull request #7133 from reaperrr/ra-reorg10

Reorganise Mods.D2k, more reorganisation for Mods.RA
D2k - Added more Rifle Inf. to Starting Units.
Merge pull request #7146 from MustaphaTR/d2k-starting-units

D2k - Added more Rifle Inf. to Starting Units.
Created new mod directory

Cloned the existing 'ra' mod folder so that I can work on a vanilla
version without losing access to the standard version.
Reinstated pillbox armament

Switched the Pillbox base defence back to using its own armament, rather
than included garrison infantry.
Merge branch 'vanilla' of https://github.com/DavidARussell/OpenRA into vanilla