Game version 148

A lot of behind-the-scenes clean-up, refactoring, and unification with the Episodes.

Customizable scratches have been added to paintjobs. Also, check out the new "copy existing paintjob" and "randomize paintjob" features.

There are also many new text phrases in this update (mainly needed for the Episodes), so please make sure you update your translations.

More information about this update can be found here: https://forum.chickeninvaders.com/t/ciu-version-148/34616