Add basic playlists management

* Index of playlists
* Create a new playlist
* Basic playlist model with mandatory name

db/migrate/20110711195337_create_playlists.rb

@@ -0,0 +1,13 @@
+class CreatePlaylists < ActiveRecord::Migration
+  def self.up
+    create_table :playlists do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :playlists
+  end
+end