v0.7

CHANGES:

• Fix support of UTF-8 (@dinosaure)
• Remove support of mrmime
mrmime will finally use emile as the parser of email address.
• Externalize some parsers:
  • address_list
  • mailbox_list
  • group
  • address
• Handle general-address (domain part) according RFC 5321 and split
  tests about the correctness of IPv6 values