I realized that playing at 4/8 for 800 levels straight is probably too much,
so I made it that only the first 10 sections count for advancing the delay
curve faster than it would normally go. Now only the last 500 levels can be
at delay level 20.
* Added Ligne C89, now known as Marathon C89.
* Refactored all the Ligne modes to no longer use the "Ligne" name.
Ligne -> Race 40
Ligne A1 -> Marathon AX4
Ligne C89 -> Marathon C89
