dbuspp_clipboard_manager / News: Recent posts

- add support to clipboard owner clear function so that when manager does not need the reference to the owner it can let it know about it.
The appropriate action would be to clear the data made available by the owner.
- delete instance to clipboard owner in destructor of clipboard_data_proxy instead of __on_release_ownership() handler.

The first release of dbuspp_clipboard_manager is now available for download.
You can read the About document in the Documentation section to know more about it.