Initial install, sudo without password

[cowboy]

Add to the docs or README, maybe:

1. sudo visudo (enter password when asked)
   • Type /%adm<Enter>3fAiNOPASSWD:<Esc>:wq<Enter>
   • Before: %admin ALL=(ALL) ALL
   • After: %admin ALL=(ALL) NOPASSWD:ALL
2. Install dotfiles per README
3. sudo visudo
   • Type /%adm<Enter>fNdf:<Esc>:wq<Enter>
   • (revert previous change)

(This assumes the default new system visudo configuration)