[addons] install from zip should install from the zip, not from packages/zip
turn CAnnouncementManager into a singleton
deinitialize CAnnouncementManager before stopping all (network) services
CPlayList: no need to send the Playlist.OnClear announcement if the playlist is already empty
Merge pull request #4725 from Montellese/announcement_refactor

refactor of CAnnouncementManager
Merge pull request #4645 from jmarshallnz/install_from_zip_not_packages

[addons] install from zip should install from the zip, not from packages
[guilib] fix labelcontrols with auto width always being marked as dirty if they specified a maximum width
[cosmetic] fix warning
Add kdev4 file to gitignore
Merge pull request #4728 from AlwinEsch/kdev4-file-to-gitignore

Add kdev4 file to gitignore