translated the remaining german notes, python comments, help and messages to english (in-game strings, parsed report lines and cli values stay german)

tools/map_dump.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""MAP-Chunk eines Level-WADs ausgeben.
+"""Dump the MAP chunk of a level WAD.
   map_dump.py level.wad [--strats] [--tiles] [--lights] [--check]
 """
 import os