[open source] make_prepatcher

So if they keep changing the format, we, less knowledgeable users, will keep being screwed? What if one day you won't feel the need to lend us helpless maplers a helping hand anymore? T_T

Thank you for fixing it though, I hope it'll work for patch 0.67~ x)

Then you can use Fiel's, which requires you to download the patch files yourself and download the Python interpreter. Or someone else can maintain my code. Or you can just wait and patch normally.