Improved Servicemix-Mail

Today I committed a refactored version of the ServiceMix-Mail component (2009.02-SNAPSHOT).

Improvements:
- better attachment recognition
- ability to set the mime type of an outgoing mail
- ability to evaluate the mime type of an incoming mail
- POP users can now process only unseen messages by setting a storage object (this feature was IMAP only before)
- the FROM field of a mail may now be set dynamically via properties of the normalized message
- ...and more...

The component is available as SNAPSHOT here. Happy testing!

Any feedback regarding the component is welcome.