new bindings for help, mark paragraph and backward-kill-word.  This
makes it more congruent to go along with C-h delete-backward, much like
C-d and M-d
new bindings for smex to override current mex.  Don't know why I wasn't
using this before
new helm bindings to go along with a new helm prefix C-c C-h
pallet update and Cask has some new stuff.