[LMP] Notify UI about mask expansion issues.
Merge pull request #306 from AlexWMF/master

[DEADLYRICS] Fixed crash with fast track changing in LMP.
[Azoth Rosenthal] Final slash in user dicts path.
[KT] Don't cache images.
[SB2] Don't cache images.
[LMP] Don't cache images.
Merge branch 'master' of github.com:0xd34df00d/leechcraft
[DeadLyrics] Don't really use the reply object after deleteLater().

That should work but seems to cause bugs and segfaults inside Qt, so better
have a workaround
[Poshuku] Fixed documentation.
[LackMan] Fixed documentation.
[Aggregator] Fixed documentation.
[LMP] Refactored file name building on transcoding.

No more ugly .mp3.ogg.
[LMP] Accurate file resolving.
[LMP] Don't transcode the video stream.

The videostream could be an embedded album art, for example.
[LMP] Use taglib for tags copying on transcoding.

ffmpeg is quite kludgy with its concepts of streams, global metadata and
the likes.
[Util] Moved sysinfo.h to util/sys/
[Util] Use QSettings to parse /etc/os-release.
[Util] Moved some stuff to xpc/

The stuff is:
 * BaseHookInterceptor
 * DefaultHookProxy
 * NotificationActionHandler
 * PassUtils
[LMP] Added missing include.
[Azoth Astrality] Fixed include path.