Merge pull request #1 from MailCore/master

Syncing my fork...
Added support for Juno
Update providers.json
Update providers.json
Added entry for mail.com
Added support for hushmail.
Add iOS build as framework for Xcode6
Merge pull request #866 from rlaferla/master

Added support for Juno
Fixed iCloud servers
Simplified extra headers implementation and content-types parameters
Generate message data for signature or encryption (never use 7bit or 8bit encoding)
Fixed thread safety in OperationQueue
Merge pull request #883 from foxinushka/fix/operation-queue-thread-safety

Fixed thread safety in OperationQueue
Merge pull request #881 from yuklai/master

Add iOS build as framework for Xcode6
Removed reference to C++ library, fixed product name, use the same info.plist
Provided helpers for OpenPGP encryption and signature
Fixed #880. nullify connection logger.
Fixed documentation