TelegramQt/SDcInfo: Added operator=().
Refactor. CTelegramCore code extracted to CTelegramConnection.
TelegramQt/CTelegramConnection: Improved RPC packages processing.

Implemented storing of outgoing packages to be able to handle errors.
Implemented processErrorSeeOther().
TelegramQt/SDcInfo: Added isValid() method.
TelegramQt/TLValues: Added AuthSentCode_BeforeLayer12 value.
CTelegramConnection: Added initial requestAuthCode() implementation.
CTelegramConnection: Renamed values of AuthState enum.

Renamed to increase distinctions with TLValues Auth* keys.
TelegramQt/Transports: Added isConnected() method.
CTelegramConnection: Implemented package redirection.

Implementation works for AuthSendCode.
CTelegramCore: Implemented package redirection.

Added requestAuthCode() method.
CTelegramConnection: Implemented signal wantedActiveDcChanged().
CTelegramCore: Implemented "wanted dc".
CTelegramConnection: Added processAuthSentCode().
TelegramQt: TLNumbers extracted to its own header.
TLTypes: Added FileLocation, UserProfilePhoto, UserStatus, TLUser.
CTelegramStream: Implemented operator>> for several TL Types.

Implemented TLUser, TLUserStatus, TLUserProfilePhoto and TLFileLocation.
TelegramQt: Added TLContact type.
CTelegramStream: Implemented operator>> for TLContact.
TelegramQt: Added initial implementation for getContacts().
testApp: Implemented contactList button.