Change; feature

* Add success and setSuccess methods to TRecoverAccountReplyData class
* Add TConfirmRegistrationRequestData and TConfirmRegistrationReplyData classes
Fix; feature

* Fix translations
* Add TeXSample::MaximumPatronymicLength and MaximumSurnameLength constants
* Add Texsample::testPatronymic and testSurname methods
Improve TInviteInfo
Remove; fix

* Remove TCommandMessage, TExecuteCommandRequestData and TExecuteCommandReplyData classes
* Add missing qRegister* statements
Remove TMessage class
Fix
Add new *RequestData and *ReplyData files
Fix bugs
Add TAbstractCache class
Improve TGroupWidget
Update README
Improve network widgets
Update translations
Fix TUserInfoWidget
Fix TUserInfoWidget
Rename TTagsWidget into TTagWidget
Add TAbstractListWidgetItemDelegate class
Improve TListWidget system
Fix TAuthorInfoWidget
Fix TAuthorInfoListWidgetItemDelegate