Fixes MIME4J-225 and MIME4J-222

* thanks Rustam Gupta for the MIME4J-222 patch
* changed version format to 0.8.0

git-svn-id: https://svn.apache.org/repos/asf/james/mime4j/trunk@1457434 13f79535-47bb-0310-9956-ffa450edef68