SCI/TODO

The following list is taken from Max's mails to -devel:

• Fixing all warnings
• Rename source files from *.c to *.cpp, and get rid of the %.c build rule in engines/sci/module.mk
• Find usage of SCUMMVM #define and resolve them, then in the end stop adding -DSCUMMVM to CPPFLAGS in module.mk
• Rearranging the files under engines/sci: I.e. get rid of include/ subdir (just move its contents to engines/sci, at some point at least)
• Converting stuff from "C pseudo classes" to real classes
• Replacing various generic FreeSCI stuff by their ScummVM counterparts. E.g. don't bother to rewrite engines/sci/include/int_hashmap.h -- instead change code to use a HashMap<int, ...> etc.
• Rename engines/sci/scummvm/scummvm_engine.* to engines/sci/sci.*
• Move engines/sci/scummvm/detection.cpp to engines/sci/detection.cpp
• In fact: Do use File, SearchManager, FSNode etc. instead of paths, fopen, etc.
• Don't use fstat, PATH_MAX
• const correctness in engines/sci/engine/savegame.c (this is a generated file, so change the source or generator, whatever is necessary)
• apply our code formatting guidelines
• change the many nice existing function documentation comments to use doxygen syntax