Set `helm-buffers-favorite-modes`

Set to `ruby-mode` and `text-mode`.
Bind `C-x b` to 'helm-buffers-list
Update `coffee-mode`
Update `color-theme-sanityinc-tomorrow`
Update `exec-path-from-shell`
Update `expand-region`
Update `full-ack`
Update `git-modes`
Update `haskell-mode`
Update `helm`
Update `js2-mode`
Update `jump-char`
Update `magit`
Update `markdown-mode`
Update `mmm-mode`
Update `multiple-cursors`
Remove `paredit` (temporarily)

The submodule somehow got out of sync, so I'm just going to recreate it.
Re-add `paredit`