fix string codings and (autocrypt) key import

enzevalos_iphone.xcodeproj/project.pbxproj

enzevalos_iphone/Autocrypt.swift

enzevalos_iphone/Base.lproj/Main.storyboard

enzevalos_iphone/CryptoObject.swift

enzevalos_iphone/DataHandler.swift

enzevalos_iphone/MailSession.swift

enzevalos_iphone/Mail_Address+CoreDataClass.swift

enzevalos_iphone/PersistentMail +CoreDataClass.swift

enzevalos_iphone/ReadViewController.swift

enzevalos_iphone/StringExtension.swift

enzevalos_iphone/SwiftPGP.swift

enzevalos_iphone/mail/IncomingMail.swift

enzevalos_iphone/providers.json