install.sh: cleanup for zsh
added prezto as a submodule
removed oh-my-zsh submodule
switch .zshrc to prezto
zsh symlinks required for prezto
install.sh: never symlink markdown files
prezto is a pain in the arse to configure
zsh_aliases: showopts for zsh
zsh: remove stuff that prezto does; setup some zsh options
install.sh: no .zlogout symlink
zsh: export VISUAL=vim
git: new & improved aliases
zsh/iterm2: alt-backspace => backward-delete-word
zsh: pyclean function
zsh: 256 colour printing function from yonchu/shell-color-pallet
git: updated rebase-since command
salt-formulae updated
git: prettier git-commits-since
git: git-commit-now
git: reset-origin command