message: feat(init): Update defaults
  `_site` is the new default dest.  If there isn't a reason to deviate,
  why should we?
  `.git` is a dot-folder and should be ignored by default.  Let's not
  confused people how how hiding works.
diff: @@ -6,10 +6,7 @@ use config::Config;
  const COBALT_YML: &'static [u8] = b"name: cobalt blog
  source: \".\"
  -dest: \"build\"
  -ignore:
  - - .git/*
  - - build/*
  +dest: \"./_site\"
  ";
  const DEFAULT_LAYOUT: &'static [u8] = b"<!DOCTYPE html>
  