Fix some incorrect German translations
- translate “turn” as “Zug” instead of “Runde”
- fix other wrongly translated words
- fix some incorrect string IDs in de.txt
- typo fixes
Lua scripts for engine testing. These scripts are the same as other Lua scripts
in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or
`EndLuaTest(TEST_FAILED)` when the test is completed.