Added SSL for MySQL connections.
GUIRadioButton: add separate textures for radio image for focus/unfocus states
[Linux] os-release: unescape quotes / backslashes
The os-release specification states that single quotes, double quotes
and backslashes are supposed to be escaped with \. Unfortunately
I missed this in my original commit 7a9aa6f5d9ac8df1c79eb06ed63bce8af162c3ba.

http://www.freedesktop.org/software/systemd/man/os-release.html
Expose ACTION_FOO, ICON_TYPE_FOO and KEY_CODE_FOO to addons
Added JSONRPC.NotifyAll as a built-in function
Use album artist fanart when there is no artist fanart

This is useful especially for albums that are by one main artist but
have some songs featuring other artists, so there may be fanart for "A"
but not "A feat. B".
fixed: compile with old versions of libdbus that don't have DBUS_TYPE_UNIX_FD defined
added: setting to disable keyboard grabbing when in fullscreen on platforms that use SDL on X11, calls SDL_WM_GrabInput(SDL_GRAB_OFF) with the SDL_FULLSCREEN temporarily zero'd, this will make SDL call XUnGrabPointer and XUnGrabKeyboard, allowing window manager keys like printscreen, volume and alt-tab to work
[LangInfo] Use preferred audio/subtitle language also for dvds and blurays.
[LangInfo] Use gui's language for dvd/bluray menus.
changed: Don't allow change of volume amplification with passthrough audio
settings: fix updating skin-related settings spinners
properly reset skin-related settings after changing the current skin (fixes #14595)
smartplaylists: use simple WHERE conditions instead of expensive IN statements
smartplaylists: cosmetics in SQL queries
smartplaylists: use SELECT DISTINCT in SQL sub-queries
smartplaylists: replace SQL IN with SQL EXISTS in WHERE conditions
[rbp/omxplayer] Add wait for buffers done calls
[rbp/omxplayer] Handle timeouts greater than a second
[rbp/omxplayer] Callback context pointer is not needed once in the class