doc: rename "Wayland" to "publican"

This directory was called Wayland during my early tries with publican where
the source layout was different and it needed to be set to the same name as
the publican output directory. This reason doesn't exist anymore, so re-name
it to publican to make it more obvious what's hiding in here.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

doc/Wayland/sources/Book_Info.xml

@@ -1,39 +0,0 @@
-<?xml version='1.0' encoding='utf-8' ?>
-<!DOCTYPE bookinfo PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
-<!ENTITY % BOOK_ENTITIES SYSTEM "Wayland.ent">
-%BOOK_ENTITIES;
-]>
-<bookinfo id="book-Wayland-Wayland">
-  <title>Wayland</title>
-  <subtitle>The Wayland display server</subtitle>
-  <productname>Documentation</productname>
-  <productnumber>0.1</productnumber>
-  <edition>1</edition>
-  <pubsnumber>0</pubsnumber>
-  <abstract>
-    <para>
-      Wayland is a protocol for a compositor to talk to
-      its clients as well as a C library implementation of
-      that protocol. The compositor can be a standalone
-      display server running on Linux kernel modesetting
-      and evdev input devices, an X application, or a
-      wayland client itself. The clients can be
-      traditional applications, X servers (rootless or
-      fullscreen) or other display servers.
-    </para>
-  </abstract>
-  <corpauthor>
-    <inlinemediaobject>
-      <imageobject>
-	<imagedata fileref="images/wayland.png" format="PNG" />
-      </imageobject>
-      <textobject>
-        <phrase>
-          Wayland logo
-        </phrase>
-      </textobject>
-    </inlinemediaobject>
-  </corpauthor>
-  <xi:include href="Common_Content/Legal_Notice.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
-  <xi:include href="Author_Group.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
-</bookinfo>