delete copy constructor and assignment operator of some public classes

Summary:
If someone was using them, it'd crash since it was raw-copying the d pointer
so you would end up with a double delete.

This is SIC, but IMHO it's fine, whoever gets a compiler failure has a bug to fix

Reviewers: mpyne

Reviewed By: mpyne

Subscribers: mpyne, kde-frameworks-devel

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D18137