Fix publishing of www pages

publish pages at the right place, this needs a manual copy since python
code cannot copy files to an existing directory.

Also remove publish-docs/www directory, it should not be published.

Change-Id: I475c1fad39e74f38ec2b642547d5eba00df84500
Note that [database] may not exist

in some ubuntus, the reader will need to add the [database] section.

This patch adds a simple clarifying remark to that effect.

Change-Id: Ibec8692bcccd177255fd64ed27ac8128651fb0bf
Closes-Bug: 1308560
Merge "Note that [database] may not exist"