Add default start of zsh

Need to have a fully functioning new shell with proper environment
variables in order for rbenv/plenv to work correctly.
Add tmux -> system pasteboard copying

Can't copy from tmux into OS X, found this solution ->
http://robots.thoughtbot.com/tmux-copy-paste-on-os-x-a-better-future
Add configuration of EasyAlign shortcuts

I like to keep the shortcuts for normal and visual mode the same, makes
for less trying to remember.