added a note about MNG-5477 for Maven 3.0.x and empty report plugin version

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1609959 13f79535-47bb-0310-9956-ffa450edef68
[MSITE-724] site:jar fails when setting custom archive manifest entry

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1610025 13f79535-47bb-0310-9956-ffa450edef68
[MCHECKSTYLE-232] added the version of Checkstyle used to the generated report

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1610147 13f79535-47bb-0310-9956-ffa450edef68
[MCHECKSTYLE-233] added link to rules documentation

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1610171 13f79535-47bb-0310-9956-ffa450edef68