Cleaned up code-style issues

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1630562 13f79535-47bb-0310-9956-ffa450edef68
Added note about useJvmChmod and java7

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1630563 13f79535-47bb-0310-9956-ffa450edef68
[MASSEMBLY-479] Updated docs about posix tar support

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1630568 13f79535-47bb-0310-9956-ffa450edef68
git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1630574 13f79535-47bb-0310-9956-ffa450edef68