Previously, I had to reverse engineer many of the bytes in a valid fumen
header. This meant that I was often working with literal byte values, as
well as guessing at what things meant, calling them "padding" or
"unknown".
However, thanks to #44, I now have a TON of knowledge about the correct
purpose of each byte in the header. This lets me properly document each
value's purpose, and it also lets me parse 4-byte groups as ints, rather
than dealing with individual raw bytes.
In summary, the changes in this PR are:
- Create a new `FumenHeader` class with individual (correctly-named!)
attributes for each 4-byte integer.
- Parse and write the fumen header as one big 520-byte chunk, instead of
handling the header in smaller increments.
- Remove a bunch of dead lines of code that were hardcoding specific
byte values, and replace them with proper integer values.
- Vastly simplify the test for valid headers by removing checks against
individual bytes..
Necessary for #40.
Fixes#44.
2a6d1c3df5