(svn r2962) - const correctness for all Get* functions and most Draw* functions that don't change their pointer parameters

- change a lot of byte player types to PlayerID
- beautify header files, same "#endif /* filename */" ending

namegen.h

@@ -7,4 +7,4 @@ typedef byte TownNameGenerator(char *buf, uint32 seed);
 
 extern TownNameGenerator * const _town_name_generators[];
 
-#endif
+#endif /* NAMEGEN_H */