Started implementing load/save functionality

src/ag-chart.c

@@ -0,0 +1,28 @@
+#include "ag-chart.h"
+
+struct _AgChartPrivate {
+    gchar *save_buffer;
+};
+
+G_DEFINE_TYPE(AgChart, ag_chart, GSWE_TYPE_MOMENT);
+
+#define GET_PRIVATE(instance) (G_TYPE_INSTANCE_GET_PRIVATE((instance), AG_TYPE_CHART, AgChartPrivate))
+
+static void
+ag_chart_class_init(AgChartClass *klass)
+{
+    g_type_class_add_private(klass, sizeof(AgChartPrivate));
+}
+
+static void
+ag_chart_init(AgChart *chart)
+{
+    chart->priv = GET_PRIVATE(chart);
+}
+
+AgChart *
+ag_chart_new(void)
+{
+    return NULL;
+}
+