Add AgIconView class

It is a subclass of GtkIconView specialised in displayind Astrognome
chart previews as icons.

src/ag-enumtypes.c.template

@@ -0,0 +1,63 @@
+/*** BEGIN file-header ***/
+/* ag-enumtypes.c - Enumeration types for Astrognome
+ *
+ * Copyright © 2013  Gergely Polonkai
+ *
+ * Astrognome is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Astrognome is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ag-enumtypes.h"
+#include "@filename@"
+
+/*** END file-header ***/
+
+/*** BEGIN file-production ***/
+/* enumerations from "@filename@" */
+/*** END file-production ***/
+
+/*** BEGIN value-header ***/
+GType
+@enum_name@_get_type(void)
+{
+    static volatile gsize g_define_type_id__volatile = 0;
+
+    if (g_once_init_enter(&g_define_type_id__volatile)) {
+        static const G@Type@Value values[] = {
+/*** END value-header ***/
+
+/*** BEGIN value-production ***/
+            {
+                @VALUENAME@,
+                "@VALUENAME@",
+                "@valuenick@"
+            },
+/*** END value-production ***/
+
+/*** BEGIN value-tail ***/
+            { 0, NULL, NULL }
+        };
+
+        GType g_define_type_id = g_@type@_register_static(
+                g_intern_static_string("@EnumName@"),
+                values
+            );
+
+        g_once_init_leave(&g_define_type_id__volatile, g_define_type_id);
+    }
+
+    return g_define_type_id__volatile;
+}
+
+/*** END value-tail ***/
+