source tree cleanup

The lib/ directory was getting a bit out of hand, so this tries
to organize things a bit so it is easier going forward to locate
the code people want to patch.

lib/util/sp-process-model.h

@@ -0,0 +1,35 @@
+/* sp-process-model.h
+ *
+ * Copyright (C) 2016 Christian Hergert <christian@hergert.me>
+ *
+ * This program 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.
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SP_PROCESS_MODEL_H
+#define SP_PROCESS_MODEL_H
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define SP_TYPE_PROCESS_MODEL (sp_process_model_get_type())
+
+G_DECLARE_FINAL_TYPE (SpProcessModel, sp_process_model, SP, PROCESS_MODEL, GObject)
+
+SpProcessModel *sp_process_model_new          (void);
+void            sp_process_model_queue_reload (SpProcessModel *self);
+
+G_END_DECLS
+
+#endif /* SP_PROCESS_MODEL_H */