Same rationale as for the `run` command

This divides the time to bisect by five.

This just multiplies `--out-degree` with `--states` to compute the transitions
parameter and thus makes it easier to execute the `run` command with the same
parameters as `bisect`

This still passes --transitions to the generator but calculates the number of
transitions based on the number of states and a desired number of edges per
state.

It doesn't make much sense for powerset, so now it's possible to omit it.

This allows to call the generator not only with --zero-frequency, but also with
--transitions.