New doco structure

As you'll see, the Oracc documentation is much fuller and more systematically organised than the old CDL doco. It's fully searchable from the Oracc home page.

You'll also find that visitors to your website can access all the user help from the [HELP] link at the left of every Page View and Item View header on your corpus pages.

But if you think anything is missing, or needs further explanation, please let me know.