pending: clementine: Add cleaner for the Clementine music player.

This doesn't support Windows (yet), but, on Linux, it saves me a bunch of
space, as Clementine caches a lot of network requests and responses.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
pending: fontconfig: Add new location of cached files for fontconfig.

Newer versions of fontconfig have deprecated the customary places to adopt a
more XDG-compliant structure. This patch includes the new place of the cache.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
pending: libdvdcss: Fix ids of the cleaner and of the option.

Bad copy and paste.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Merge pull request #19 from rbrito/additional-filters-01

Add Clementine cleaner, fix libdvdcss cleaner id, update fontconfig cached files locations.