----------------
* Avoid a site error if the mail cannot be sent, e.g. because the mail
server is down.
[optilude]
* Avoid throwing an exception on encoded strings in the replacer.
[optilude]
* Caught workflow exception when trying to get state on object without any
workflow.
[tiazma]
* Added cc and bcc fields to IMailAction enabling the use of these fields in
mail messages
[erico_andrei]
* Added new variables to IMailReplacer so it is possible to send emails to
users with other roles than owner on the object
[erico_andrei]
* Made sure Archetypes content implements IDublinCore (It's not the default
behavior until AT 1.5.10)
[erico_andrei]
* Correct action mail fail on try to replace bcc or cc when it returns None [lucmult]