This adds new features to the configure.py script (based on dtk):

• added the possibility to configure C flags and compiler version per-file
• added multi-version support, by default it will configure each version that has a baserom in the extract folder, otherwise you can still have the older behavior by using tools/configure.py --version <eur|jp> (or simply -v)
• when using multiversion, objdiff will display all setupped ones
• removed decomp.me compiler version as it is now determined based on the compiler version (for convenience)
• decomp.me scratch will use the same C flags configured in the configure.py script

This allowed me to remove some pragmas in source files, which was the main reason why I wanted to do this

Additional note: due to dsd generating the objdiff config I had to make a script to make this working, what it does is just resolving paths and merging the unit list from each versions and output to one single file, also note that link order is still defined by the delinks.txt files