Squashed commit of the following:

commit 997c1138f549766d797f1ba6da26e1e8394387e2
Author: emeric <itmfr@yahoo.fr>
Date:   Sat Jan 10 17:50:20 2015 +0100

    Implemented save, load and delete playlists

commit bee08a16b544bb21785c45f083ab7c10e65bfa6e
Author: emeric <itmfr@yahoo.fr>
Date:   Thu Jan 8 23:46:43 2015 +0100

    Reworked the database code layout in order to add playlists

src/ui/video/VideoWidget.cpp

@@ -68,6 +68,7 @@ VideoWidget::playVideo(boost::filesystem::path p)
 		// Get user preferences
 		{
 			Wt::Dbo::Transaction transaction(_sessionData.getDatabaseHandler().getSession());
+
 			Database::User::pointer user = _sessionData.getDatabaseHandler().getCurrentUser();
 			if (user)
 			{