Change the boolean markers from T/F to 1/0

[ghost]

Got this idea from reading logzero's post here:
#27 (comment)

This is a modification he made was to replace T/F with 1/0.

The motivation for this would be to free up "T" to be used as the TYPE marker in the optimized container format instead of '$' and free up "F" and "f" to be used for the float32/64 types instead of "D" and "d".

Obviously would be a fairly big breaking change.

[kxepal]

+1

Have nothing to argue. F marker more sensible to floating values since double is just 64-bit float. And I can recall some cases when we had needed in T marker, but it was already used.

[ghost]

Not fixing; no massive win for making this fundamentally breaking change. Also makes the markers inconsistent with the friendly-ASCII design.