added support for configuration-level exclusions
Merge pull request #33 from mlueders/fix_maven_publish_ext_exclusions

added support for configuration-level exclusions
[Gradle Release Plugin] - pre tag commit:  '0.15'.
[Gradle Release Plugin] - new version commit:  '0.16-SNAPSHOT'.
Merge pull request #34 from mlueders/remove_build_date_from_manifest

removed Build-Date manifest entry since it was causing jar task to fail ...
updated cpd xslt to correctly render
added multi-module support for jacoco-ext plugin
updated PostEvaluationNotifier to support closures with a single Project or a set of projects as input