Fix broken renamed slideshows app.

Use the right (old) table name in initial migration so that a later
migration can correctly rename it.

Author: mrmachine

docs/changelog.md

@@ -8,6 +8,19 @@
     content plugin available (which renders a grid of thumbnails into a
     lightbox).
 
+Breaking changes:
+
+  * The initial migration for `icekit.plugins.slideshow` had the wrong database
+    table name, which meant that the `0004_auto_20160821_2140` migration would
+    not have correctly renamed the database table when upgrading to `>=0.10`
+    from an earlier version.
+
+    To fix this, run the following SQL manually:
+
+        ALTER TABLE "slideshow_slideshow" RENAME TO "icekit_plugins_slideshow_slideshow";
+
+    If you have yet to upgrade from `<0.10`, you don't need to do anything.
+
 ## 0.15 (27 September 2016)
 
   * Improvements to publishing to make it accomodate more types of content.

icekit/plugins/slideshow/migrations/0001_initial.py

@@ -19,7 +19,7 @@ class Migration(migrations.Migration):
                 ('show_title', models.BooleanField(default=False, help_text='Should the title of the slide show be displayed?')),
             ],
             options={
-                'db_table': 'icekit_plugins_slideshow_slideshow'
+                'db_table': 'slideshow_slideshow'
             },
             bases=(models.Model,),
         ),