CHAIN-72 - configuration façade APIs

still better separation between configuration APIs and XML implementation
configuration exception moved to configuration package
XML related classes moved in proper config.xml subpackage
configuration exception moved to the configuration package/module
registry throws a runtime exception rather than a configuration exception

trivial: updated ignore list

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/chain/trunk@1486478 13f79535-47bb-0310-9956-ffa450edef68
20 files changed