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/joystick_angle_test.cc b/y2019/joystick_angle_test.cc
index 7173b80..4d53ca0 100644
--- a/y2019/joystick_angle_test.cc
+++ b/y2019/joystick_angle_test.cc
@@ -2,9 +2,10 @@
 
 #include <iostream>
 
-#include "frc971/input/driver_station_data.h"
 #include "gtest/gtest.h"
 
+#include "frc971/input/driver_station_data.h"
+
 using y2019::input::joysticks::GetJoystickPosition;
 using y2019::input::joysticks::JoystickAngle;