hugo builds no site if there are only drafts

if you run:
hugo
and all of your posts are drafts, no site gets build.
Fix #394 - Docs: add a missing link to the livereload page in the intro
Config changes and Live Reload

I noticed that config file changes do not work with Live Reload feature. This may be "fixed" in future but for now adding a note might avoid confusion.
Added yaml menu example

Added yaml menu example, matching with existing toml example. Also added link to sitewide config page.
switch to new location of goyaml