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/callgraph/sp-callgraph-view.h

@@ -0,0 +1,50 @@
+/* sp-callgraph-view.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert@redhat.com>
+ *
+ * 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_CALLGRAPH_VIEW_H
+#define SP_CALLGRAPH_VIEW_H
+
+#include <gtk/gtk.h>
+
+#include "callgraph/sp-callgraph-profile.h"
+
+G_BEGIN_DECLS
+
+#define SP_TYPE_CALLGRAPH_VIEW (sp_callgraph_view_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (SpCallgraphView, sp_callgraph_view, SP, CALLGRAPH_VIEW, GtkBin)
+
+struct _SpCallgraphViewClass
+{
+  GtkBinClass parent_class;
+
+  void (*go_previous) (SpCallgraphView *self);
+
+  gpointer padding[8];
+};
+
+GtkWidget          *sp_callgraph_view_new             (void);
+SpCallgraphProfile *sp_callgraph_view_get_profile     (SpCallgraphView    *self);
+void                sp_callgraph_view_set_profile     (SpCallgraphView    *self,
+                                                       SpCallgraphProfile *profile);
+gchar              *sp_callgraph_view_screenshot      (SpCallgraphView    *self);
+guint               sp_callgraph_view_get_n_functions (SpCallgraphView    *self);
+
+G_END_DECLS
+
+#endif /* SP_CALLGRAPH_VIEW_H */