Several email module fixes: - case insensitive email attribute comparison - catch more attachment filenames - don't create empty recipients and email tags - fixed typos - made constant for namespace prefix - introduced default mime charset - remove newlines from base64 that comes from uw-imap - if email content is quoted-printable encoded and the content type binary, it needs to be encoded into base64 - fixed content type check - decode all email headers - non-ascii (non encoded) chars are not allowed in email headers -> we ignore them - added missing namespaces Approved: David Graf, Dennis Knochenwefel, Alexander Kreutz