LinQ 4.1.4 released!

This is a minor feature enhancements release.

* Add User Nickname (JEP-0172) support in presence subscriptions.
* Show message time stamps in chat dialog.
* Show last status time stamp in tooltip over a contact.
* Ensure emoticons are followed by one or more whitespaces.
* Show last few history messages when a chat dialog is opened.
* Add some icons to the formatbar in chat dialog.
* Prompt the user before unregistering from the current server.
* The 'Offline' group in roster window is now closed by default.
* Show a non-default icon if a service falls in the 'directory' category.