first step of the big refactoring ("tree" branch).

From here on, we can track changes. It made no sense to put the
development up to this point into git.

include/all.h

@@ -0,0 +1,52 @@
+/*
+ * This header file includes all relevant files of i3 and the most often used
+ * system header files. This reduces boilerplate (the amount of code duplicated
+ * at the beginning of each source file) and is not significantly slower at
+ * compile-time.
+ *
+ */
+#ifndef _ALL_H
+#define _ALL_H
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <locale.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <glob.h>
+#include <errno.h>
+#include <err.h>
+#include <stdint.h>
+
+#include <xcb/xcb.h>
+#include <xcb/xcb_aux.h>
+#include <xcb/xcb_event.h>
+#include <xcb/xcb_keysyms.h>
+#include <xcb/xcb_icccm.h>
+
+#include "util.h"
+#include "commands.h"
+#include "ipc.h"
+#include "tree.h"
+#include "log.h"
+#include "xcb.h"
+#include "manage.h"
+#include "workspace.h"
+#include "i3.h"
+#include "x.h"
+#include "click.h"
+#include "floating.h"
+#include "config.h"
+#include "handlers.h"
+#include "randr.h"
+#include "xinerama.h"
+#include "con.h"
+#include "load_layout.h"
+#include "render.h"
+
+#endif