Woodpecker: Minor fix in CMakeLists.  ${QTKOAUTH_LIBRARY} ->  ${QTKOAUTH_LIBRARIES}
Win32: Add build dir to ignores.
Overall: Use CMakeDependentOption.cmake to disable non compatible plugins on Win32.
Merge remote-tracking branch 'origin/master' into mingw

Conflicts:
	src/CMakeLists.txt
	src/plugins/azoth/CMakeLists.txt
	src/plugins/lmp/CMakeLists.txt
	src/plugins/musiczombie/CMakeLists.txt
Vrooby: Disable UNIX only plugins on Win32
Overall: Enable SB2 and Vrooby on Win32. Now them works. Minor changes.
SB2: Use WITH_X11 only on Linux and BSD platforms
[Core] Changed ENABLE_CLANG_QUIRKS semantics.

Enable clang quirks by default for Clang compiler, also allow one to
enable it for arbitrary compiler.
[Util] Fixed ResourceLoader with caching on large pixmaps.

QCache::insert() can delete the passed object immediately, so we need
to make a copy.

clang-analyzer helper me to spot this.
[Lads] Check if LC menu is actually found.

clang-analyzer helper me to spot this.
[Blogique Metida] Properly handle unknown poll types.

clang-analyzer helper me to spot this.
[BitTorrent] Eliminated some dead code.

clang-analyzer helper me to spot this.
[Monocle Dik] Removed double assignment.

clang-analyzer helper me to spot this.
[MT] Fixed possible double-free.

clang-analyzer helper me to spot this.
[Monocle] Fixed too long object lifetime.

clang-analyzer helper me to spot this.
[Azoth Murm] Support removing accounts.
[XSD] Schedule cleanup instead of immediate cleanup.

Speeds things up threefold on accounts removal in Murm.
[LastFMScrobble] Fixed leaking event attend markers.
[LastFMScrobble] Fixed leaking recent releases.
[Summary] Don't leak context menu actions.