Merge pull request #1 from MailCore/master

Syncing my fork...
Add IMAP search body
Add allows new permanent flags property in folder info.
Clarify the difference between -searchBody: and -searchContent:
Merge pull request #854 from PrapatB/IMAP-Search-Body

Add IMAP search body
Fixed typo in a documentation.
Merge pull request #864 from robario/patch-1

Fixed typo in a documentation.
Fixed date formatter, CoreFoundation format
Use correct constants
Initialize the allow new permanent flags default value.
Merge pull request #855 from pitiphong-p/allows-permanent-flags

Add allows new permanent flags property in folder info.
Updated to libetpan 51ca6bfc3c
Added support for Juno
Update providers.json
Update providers.json
Added entry for mail.com
Added support for hushmail.
Fixed property name
fixed build of ICU
Add yandex.ru (IMAP/SMTP) to providers list

Details in Russian on http://help.yandex.ru/mail/mail-clients/ssl.xml