Change AnnouncePlayerPlay to announce speed == 0 for pausing slideshow or picture.
[Settings] Make Settings level lockable
[Settings] Treat 'Set as default' in CGUIDialogXXXSettings as expert level
renderer: drop old texture done event for gles
[skin.confluence] add description textbox (ID 6) to SettingsCategory.xml
Merge pull request #2865 from Fice/lockable_settings

profiles: allow settings to be locked on specific levels
Merge pull request #2573 from ulion/slideshow_announce_onplay_speed_zero_for_pausing

jsonrpc: change Player.OnPlay to announce speed 0 for pausing slideshow or picture
Merge pull request #2958 from Montellese/settings_description_confluence

[confluence] add settings descriptions to GUI
[lang] update of internal addon language files
[lang] update of core language files
[lang] update of skin.confluence language files
[lang] fixed: empty msgid entries
Merge pull request #2956 from davilla/drop-texturedone-event-for-gles

renderer: drop old texture done event for gles