Added legacy save-breaking behavior option

Added an option to use the old save-twice method for breaking and
extracting information from saves. This uses a separate bin file for its
keystream. This is useful if the new save-once method doesn't properly
decrypt all slots (despite all slots seeing all three states)
Added release changelog
Changed version numbering

Because 1.31 technically comes after 1.30, which is after 1.29, right?
So 1.3 updated should be 1.3.1.... I think....