Update beets to 1.3.18:

Dependencies:
* PyYAML 3.11
* Unidecode 0.4.19
* beets 1.3.18
* colorama 0.3.7
* enum34 1.1.6
* jellyfish 0.5.4
* munkres 1.0.7
* musicbrainzngs 0.6
* mutagen 1.32

libs/beetsplug/cue.py

@@ -0,0 +1,57 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 Bruno Cauet
+# Split an album-file in tracks thanks a cue file
+
+from __future__ import division, absolute_import, print_function
+
+import subprocess
+from os import path
+from glob import glob
+
+from beets.util import command_output, displayable_path
+from beets.plugins import BeetsPlugin
+from beets.autotag import TrackInfo
+
+
+class CuePlugin(BeetsPlugin):
+    def __init__(self):
+        super(CuePlugin, self).__init__()
+        # this does not seem supported by shnsplit
+        self.config.add({
+            'keep_before': .1,
+            'keep_after': .9,
+        })
+
+        # self.register_listener('import_task_start', self.look_for_cues)
+
+    def candidates(self, items, artist, album, va_likely):
+        import pdb
+        pdb.set_trace()
+
+    def item_candidates(self, item, artist, album):
+        dir = path.dirname(item.path)
+        cues = glob.glob(path.join(dir, "*.cue"))
+        if not cues:
+            return
+        if len(cues) > 1:
+            self._log.info(u"Found multiple cue files doing nothing: {0}",
+                           map(displayable_path, cues))
+
+        cue_file = cues[0]
+        self._log.info("Found {} for {}", displayable_path(cue_file), item)
+
+        try:
+            # careful: will ask for input in case of conflicts
+            command_output(['shnsplit', '-f', cue_file, item.path])
+        except (subprocess.CalledProcessError, OSError):
+            self._log.exception(u'shnsplit execution failed')
+            return
+
+        tracks = glob(path.join(dir, "*.wav"))
+        self._log.info("Generated {0} tracks", len(tracks))
+        for t in tracks:
+            title = "dunno lol"
+            track_id = "wtf"
+            index = int(path.basename(t)[len("split-track"):-len(".wav")])
+            yield TrackInfo(title, track_id, index=index, artist=artist)
+        # generate TrackInfo instances