Binary parts now use full random bytes for binary parts (not only letters)
Fix to the MailMatchingUtils size calculator (uses getContent and not part.getSize)
Added a debug helper: exception nesting.

git-svn-id: https://svn.apache.org/repos/asf/james/postage/trunk@451809 13f79535-47bb-0310-9956-ffa450edef68