Support prompt_for aliases `list' and `blocks'
Support prompt_for aliases `list' and `blocks'

`list` is an alias for `multi-line`, since that's what I keep trying to
use in hook scripts.  `blocks` is an alias for `multi-block`, so that I
don't ever have to use the _multi_ prefix again.

Fixes #256

starkandwayne/genesis,starkandwayne/genesis,starkandwayne/genesis