Handle addressing plural recipients better
Only yield after all tags converted
Corrected handling of multiple recipients with expanding tags
Allow spray to handle a list or tuple of recipients
Sprayd fixes to expand properly, address recipients, and ignore bcc:admin
Kludge to convert pledge_amounts back to unicode.  (otherwise £ symbol out of str range)
Only unicode strings go to SQS.  Only str strings return.
Haven’t investigated boto config yet to fix this properly.
Avoid double decode
Merge branch 'develop'