Add basic playlists management

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

app/controllers/playlists_controller.rb

@@ -0,0 +1,18 @@
+class PlaylistsController < ApplicationController
+  def index
+    @playlists = Playlist.all
+  end
+
+  def new
+    @playlist = Playlist.new
+  end
+
+  def create
+    @playlist = Playlist.new params[:playlist]
+    if @playlist.save
+      redirect_to :action => 'index'
+    else
+      render :action => 'new'
+    end
+  end
+end