#1529212 by arkestra and #1855650 by tutumlum: Fix executing a query containing IN() with an empty variable.

#1423224 by oadaeh, mjorlitzky: Fix a form field being overwritten by another field of the same name.

#1353504 by oadaeh: Fix problem where selecting authenticated users role resulted in no users being selected.

#1314372 by oadaeh: major overhaul of opting out and selecting of categories. See CHANGELOG.txt and issue for detailas.

Fix various errors with getting and setting recipients and recipient counts. Also made a fix for an aspect of text filters. More to come on that front.

#1262178 by oadaeh, Fix the rest of sending w/o Mime Mail that broke getting it to work w/Mime Mail.

Fixed sending HTML and attachments with the Mime Mail module. There are still some things I want to re-think through about all that.