* Add `<script>` and `<expression>` to `<int:inbound-channel-adapter>` * Refactoring for `DefaultInboundChannelAdapterParser` * Introduce `ScriptExecutingMessageSource` to allow scripts' `MessageProcessor` implementations work as a source for polling endpoint JIRA: https://jira.springsource.org/browse/INT-2867 INT-2867: documentation In addition the tests for Lifecycle attributes Polishing