resync with trunk.
additional changes:
remove <templates/> from publication.xconf, allow only single
<template/>.
updated publication.rng
updated global readme.xml
TODO: rip out the multi-templates, array-based code entirely.


git-svn-id: https://svn.apache.org/repos/asf/lenya/branches/trunk-rework-pubconf@526211 13f79535-47bb-0310-9956-ffa450edef68