thcrap: Binary hacks: Document the syntax.
thcrap: Binary hacks: Document the syntax.

Seemed necessary, just from the fact that the +/- sign is mandatory for
float and double literals.

Funded by GhostPhanom.

thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap