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/control_loop_test.cc b/frc971/control_loops/control_loop_test.cc
index e28f595..6704bf5 100644
--- a/frc971/control_loops/control_loop_test.cc
+++ b/frc971/control_loops/control_loop_test.cc
@@ -3,8 +3,5 @@
 #include <chrono>
 
 namespace frc971 {
-namespace testing {
-
-
-}  // namespace testing
+namespace testing {}  // namespace testing
 }  // namespace frc971