Merge pull request #8 from atlassian/master

increase clover version number
Increase clover-for-jenkins plugin version to 4.1.0. Thanks to this, numbering is consitent with the clover-for-hudson plugin (it also has 4.1.0 based on clover core 3.1.12)
[maven-release-plugin] prepare release clover-4.1.0
[maven-release-plugin] prepare for next development iteration
NONE: fix of the bug where every build was adding new Clover report artifact to the job;

CloverBuildWrapper - adding CloverPublisher only if there is no existing one with the same report directory (manual search  replaced the List.contains() which called Object.equals() which was wrong)
CloverPublisher - build.getActions().add() replaced by build.addAction()
pom.xml - using LTS version of parent plugin (1.509.2), using clover core 3.1.12.1; rollback to 4.1.0-SNAPSHOT; file formatting
[maven-release-plugin] prepare release clover-4.1.0
NONE
[maven-release-plugin] prepare release clover-4.1.0-3.1.12.1
[maven-release-plugin] prepare for next development iteration