Fix crash in recipientWithReplyAll when mCc is NULL
Added more checks for NULL fields in recipientWithReplyAll
Remove unnecessary calls to to()->count() and cc()->count()
Updated fetchMessagesByNumberOperationWithFolder documentation
	* Removed unnecessart messageCount variable.
	* Fixed issue with number of messages.
Fix providers identifier
Merge remote-tracking branch 'upstream/master'
Implement Gmail Thread ID
Whitespace
Moar whitespace
Removed spurious comments
Retain session when IMAP and SMTP operations are running. Fixed #127, fixed #128.
POP operations retain the session. Fixed #129
Fixed threadID types
Remove log
Merge pull request #136 from CodaFi/ThreadID

Implement Gmail ThreadID extension. Fixed #11.
Merge remote-tracking branch 'upstream/master'
Implement Message ID
Re-add IMAPMessagesRequestKindGmailMessageID
Cleanup
Merge pull request #140 from CodaFi/MsgID

Implemented Gmail MessageID extension. Fixed #13.