Merge remote-tracking branch 'upstream/master'
De-namespace
Adds localized description table
Merge pull request #177 from CodaFi/Un-namespace-MCLog

Un-namespace MCLog()
Moved table
Added MCOErrorNone message
Added OAuth2 token API on MCOIMAPSession
Added simple rendering methods for RFC822 message at C++ API level
Objective-C bridge for simple rendering methods for RFC822 message
Merge pull request #178 from CodaFi/localized-description

Localized description for NSError with MCOErrorDomain.