Log Message:
Update to 2.208

Upstream changes:
2.208     2015-07-20 20:34:04-04:00 America/New_York
        - same as v2.207
        - ...but bump perl required to v5.8

2.207     2015-07-04 14:23:36-04:00 America/New_York (TRIAL RELEASE)
        - fold headers passed to header arg in create method
          https://github.com/rjbs/Email-Simple/issues/7

2.206     2015-03-26 23:30:51-04:00 America/New_York
        - the changes from 2.204 are back (and re-listed here), but now with
          the added benefit of not breaking Email::MIME; see the git repository
          for the sordid details
        - provide header_raw and header_raw_set for consistent behavior between
          Email::Simple and Email::MIME; also, header_raw_pairs

2.205     2015-03-26 14:54:45-04:00 America/New_York
        - undo changes from 2.204 until safe Email::MIME upgrade path is
          available

2.204     2015-03-25 22:50:49-04:00 America/New_York
        - provide header_raw and header_raw_set for consistent behavior between
          Email::Simple and Email::MIME; also, header_raw_pairs