The name "demote" is only meaningful to those who already know what
the Cryptol primitive does. Also, due to recent changes in the error
and warning messages, the name "demote" is showing up much more often
in REPL output. For example:
Defaulting type argument 'rep' of 'demote' to [2]
Showing a specific instance of polymorphic result:
* Using 'Integer' for type argument 'rep' of 'Cryptol::demote'
These messages will hopefully be made less confusing to non-experts
if the name "demote" is replaced with "number".
There are separate benchmarks for the Extras.cry module and the combined
Prelude + Extras module because the performance characteristics are nonlinear.
