Add option for ignoring noisy fields
Add option for ignoring noisy fields

Sometimes when you change a lot of profiles it's nice to ignore these
from the diff since they always change on regen and there's nothing you
can do to affect their values. Including TimeToLive is a bit of a
stretch but you can't affect it anyways.

keith/dotfiles,keith/dotfiles,keith/dotfiles,keith/dotfiles,keith/dotfiles,keith/dotfiles