Polynomial evaluation points and elliptic curve points are both things
we rely on, but never in the same context (we either use elliptic curve
points inside circuits, or implement proving systems on top of them).
* describe groups in general, rather than via the example of F_p^*
* explain the isomorphism between group elements and scalars, and how it is useful
* corrections and pedantry :-)
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
