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/frc971/wpilib/ahal/PowerDistributionPanel.cc b/frc971/wpilib/ahal/PowerDistributionPanel.cc
index 39087fb..e9487e7 100644
--- a/frc971/wpilib/ahal/PowerDistributionPanel.cc
+++ b/frc971/wpilib/ahal/PowerDistributionPanel.cc
@@ -9,10 +9,10 @@
 
 #include <sstream>
 
-#include "hal/HAL.h"
-#include "hal/PowerDistribution.h"
-#include "hal/Ports.h"
 #include "frc971/wpilib/ahal/WPIErrors.h"
+#include "hal/HAL.h"
+#include "hal/Ports.h"
+#include "hal/PowerDistribution.h"
 
 using namespace frc;
 #define WPI_LIB_FATAL_ERROR(tag, msg)