* Upgrade Twitter sample to latest Spring Integration version
* Twitter search test does not run with authentication by default
* Twitter search test will run every time the project builds
* Upgraded all Spring Integration dependencies to 2.1.0.RELEASE
* All Samples use the new Artifactory-based Milestone Repository http://repo.springsource.org/milestone (As the repositories are additive, this repository will also include the release repo)
* Added versions to all Maven plugin declarations, reducing the amount WARNING-level logging substantially