* modules/prelude-evil.el: keep selection after visual shift
Slim helm module

- Keep only the basic configurations
- Code style
Tell savehist to actually save "search-ring"…

…instead of "search" and "ring".
Merge pull request #676 from toctan/helm-cleanup

Slim helm module
Merge pull request #682 from Fanael/master

Tell savehist to actually save "search-ring"
Merge pull request #641 from avsej/evil-visual-shift

Keep selection after visual shift