Set macOS settings in setup scripts

[nathanshelly]

• [x] Change macOS user preferences via command line | pawelgrzybek.com
• [x] https://github.com/mathiasbynens/dotfiles/blob/master/.macos
• [x] https://github.com/pawelgrzybek/dotfiles/blob/master/setup-macos.sh

[nathanshelly]

Interesting possible utility - https://github.com/benbalter/plister

[nathanshelly]

Example setting to change: defaults write com.apple.screencapture location ~/Downloads