Change bindings & layout

Update the aliases to reflect a more natural-speak naming.
Update the list of apps and layout.
Change ZSH themeing and tmux start-up

Tmux needs to handle Unicode the right way to display Vim properly.
Now tmux will start with the `u` option.

It is fully compatible with other tmux aliases/modifications.
Remove old aliases from setup

Permanently removed `slate.js`. Will stick with old setup syntax.
I find it more readable than JavaScript.