Hi all.

The popular functions any and every (also in SRFI-1) made me stumble over
any-bits-set? and all-bits-set?.
The omission of the ? in any and every has historical reasons,
but we can do it right in this SRFI - with ?.

Better names:
any-bit-set? every-bit-set?
(or less clear: any-set? every-set?)

Greetings
Sven