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/y2020/vision/sift/fast_gaussian.h b/y2020/vision/sift/fast_gaussian.h
index 580083f..f243e53 100644
--- a/y2020/vision/sift/fast_gaussian.h
+++ b/y2020/vision/sift/fast_gaussian.h
@@ -3,9 +3,10 @@
 
 #include <type_traits>
 
-#include <opencv2/core/mat.hpp>
-#include "HalideBuffer.h"
 #include "glog/logging.h"
+#include <opencv2/core/mat.hpp>
+
+#include "HalideBuffer.h"
 
 namespace frc971 {
 namespace vision {
@@ -39,6 +40,6 @@
                              cv::Mat *difference, double sigma);
 
 }  // namespace vision
-}  // namespace vision
+}  // namespace frc971
 
 #endif  // Y2020_VISION_SIFT_FAST_GAUSSIAN_H_