Add import of Audioscrobbler files

Here we add a model for holding Audioscrobbler imports and some code to
process the tab-separated files we get from Rockbox.

vrobbler/apps/scrobbles/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from scrobbles.models import Scrobble
+from scrobbles.models import AudioScrobblerTSVImport, Scrobble
 
 
 class ScrobbleInline(admin.TabularInline):
@@ -10,6 +10,13 @@ class ScrobbleInline(admin.TabularInline):
     exclude = ('source_id', 'scrobble_log')
 
 
+@admin.register(AudioScrobblerTSVImport)
+class AudioScrobblerTSVImportAdmin(admin.ModelAdmin):
+    date_hierarchy = "created"
+    list_display = ("id", "tsv_file", "created")
+    ordering = ("-created",)
+
+
 @admin.register(Scrobble)
 class ScrobbleAdmin(admin.ModelAdmin):
     date_hierarchy = "timestamp"