Add initial version of the embed coverart plugin.

This plugin allows users to embed the cover into the audio file.
Probaly still has a few bugs but it should work in most cases right
now.

beetsplug/embedcoverart.py

@@ -0,0 +1,45 @@
+from beets.plugins import BeetsPlugin
+from beets import mediafile
+
+import os, logging
+
+from email.mime.image import MIMEImage
+
+log = logging.getLogger('beets')
+log.addHandler(logging.StreamHandler())
+
+
+class EmbedAlbumartPlugin(BeetsPlugin):
+    '''Allows albumart to be embedded into the actual files'''
+
+    def __init__(self):
+        self.register_listener('loaded', self.loaded)
+        self.register_listener('album_imported', self.album_imported)
+
+    def configure(self, config):
+        pass
+
+    def loaded(self):
+        pass
+
+    def album_imported(self, album):
+        albumart = album.artpath
+        ALLOWED_MIMES = ('jpeg','png')
+
+        if albumart:
+            albumart_raw = open(albumart, 'rb').read()
+            img = MIMEImage(albumart_raw)
+            mime_img = img.get_content_subtype()
+
+            if mime_img in ALLOWED_MIMES:
+                mime_type = 'image/%s' % mime_img
+
+            for item in album.items():
+                f = mediafile.MediaFile(item)
+                
+                if "mp3" in item.type:
+                    f.albumart_mime = mime_type
+                
+                f.albumart_data = albumart_raw
+                f.save()
+