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/y2018/control_loops/superstructure/arm/arm.cc b/y2018/control_loops/superstructure/arm/arm.cc
index ab5deea..0749e3f 100644
--- a/y2018/control_loops/superstructure/arm/arm.cc
+++ b/y2018/control_loops/superstructure/arm/arm.cc
@@ -4,9 +4,9 @@
 #include <iostream>
 
 #include "aos/logging/logging.h"
-#include "y2018/constants.h"
 #include "frc971/control_loops/double_jointed_arm/demo_path.h"
 #include "frc971/control_loops/double_jointed_arm/dynamics.h"
+#include "y2018/constants.h"
 #include "y2018/control_loops/superstructure/arm/arm_constants.h"
 #include "y2018/control_loops/superstructure/arm/generated_graph.h"
 
@@ -172,7 +172,7 @@
         break;
       }
     }
-    [[fallthrough]];
+      [[fallthrough]];
 
     case State::GOTO_PATH:
       if (outputs_disabled) {