Implement mail inflow

in previous versions of as we had mail-ra resource adapter that added functionality of handling inflow mails.
there is implementation of this ironjacamar so the code could be reused.
Resource addapter could/should be added the same way hornetq addapter is added in messaging subsystem.

code and documentation from ironjacamer
https://svn.jboss.org/repos/jbossas/projects/jboss-jca/trunk/adapters/src/main/java/org/jboss/jca/adapters/mail/
http://docs.jboss.org/ironjacamar/userguide/1.1/en-US/html/introduction.html#overview_inbound