Revert "Translation of motd and credits"

This reverts commit 38f9fc8fd691d66018eec904eefc033b38601594.
Load a separate motd/credits file for each locale

File name is created from a base path + locale + extension.
This system is also used to lo load the localized names json data.

Move credits and motd file into separate folders in data/ and
rename them to match the system that data/lang/ uses.