Remove unnecessary autoload call
Redefine C-c C-s to run utop

Instead of tuareg-run-ocaml.  This avoids the problems described in
issue #626. Nominally fixes #626.
Merge pull request #632 from RadicalZephyr/tuareg-utop-integration

Tuareg utop integration
Merge branch 'master' of github-personal:bbatsov/prelude