Updated commons-io to 2.4 fixed some tests

git-svn-id: https://svn.apache.org/repos/asf/james/mime4j/trunk@1457431 13f79535-47bb-0310-9956-ffa450edef68
Changed version format to tree component style 0.8.0

git-svn-id: https://svn.apache.org/repos/asf/james/mime4j/trunk@1457432 13f79535-47bb-0310-9956-ffa450edef68