Dynamic: Add DynamicContentIncludePage to allow including pages

dynamic/dynamiccontent.h

@@ -11,9 +11,15 @@ class DynamicContent
 	Database *database;
 	UrlProvider *urlProvider;
 
+	std::string argument;
+
   public:
 	DynamicContent(Template &templ, Database &database, UrlProvider &urlProvider);
 	virtual std::string render() = 0;
+	virtual void setArgument(std::string argument)
+	{
+		this->argument = argument;
+	}
 	virtual ~DynamicContent()
 	{
 	}