Move handler for clicking to its own file

include/click.h

@@ -0,0 +1,16 @@
+/*
+ * vim:ts=8:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ *
+ * © 2009 Michael Stapelberg and contributors
+ *
+ * See file LICENSE for license information.
+ *
+ */
+#ifndef _CLICK_H
+#define _CLICK_H
+
+int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event);
+
+#endif