Run clang-format on the entire repo

This patch clang-formats the entire repo. Third-party code is
excluded.

I needed to fix up the .clang-format file so that all the header
includes are ordered properly. I could have sworn that it used to work
without the extra modification, but I guess not.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I64bb9f2c795401393f9dfe2fefc4f04cb36b52f6
diff --git a/y2019/vision/image_writer.cc b/y2019/vision/image_writer.cc
index 51e2c60..4ca9b96 100644
--- a/y2019/vision/image_writer.cc
+++ b/y2019/vision/image_writer.cc
@@ -1,14 +1,16 @@
-#include <fstream>
+#include "y2019/vision/image_writer.h"
+
 #include <sys/stat.h>
 
+#include <fstream>
+
 #include "glog/logging.h"
-#include "y2019/vision/image_writer.h"
 
 namespace y2019 {
 namespace vision {
 
 ImageWriter::ImageWriter() {
-  LOG(INFO) <<  "Initializing image writer";
+  LOG(INFO) << "Initializing image writer";
   SetDirPath();
 }