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/control_loops/c2d.h b/frc971/control_loops/c2d.h
index 50315e6..a11fed5 100644
--- a/frc971/control_loops/c2d.h
+++ b/frc971/control_loops/c2d.h
@@ -4,6 +4,7 @@
 #include <chrono>
 
 #include <Eigen/Dense>
+
 #include "aos/time/time.h"
 // We need to include MatrixFunctions for the matrix exponential.
 #include "unsupported/Eigen/MatrixFunctions"