add cc/bcc toggle and hidden cc/bcc fields
add recipient and optional cc/bcc to replies as well
only make links in mail content or signature appear blue
add forward button to reply
style 'Forward' function a bit less present
toggle cc/bcc fields
- send cc and bcc to the server
- disable cc and bcc on send
also add toggling for reply cc/bcc
leave out bcc from replies for now
adding cc and bcc to the mail message
add cc/bcc and … to l10n
fix js error
- add from email to tooltip
- on reply insert sender into the to field
 - pre-fill cc field
shoe cc-field as soon as it is filled
comment out non-functional forward for now
Merge pull request #103 from owncloud/cc-bcc

add cc/bcc toggle and hidden cc/bcc fields, also Reply all and Forward back again
throw exception if message is unknown