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/solvers/sparse_convex.cc b/frc971/solvers/sparse_convex.cc
index dfb418f..7e2a6ca 100644
--- a/frc971/solvers/sparse_convex.cc
+++ b/frc971/solvers/sparse_convex.cc
@@ -1,10 +1,9 @@
 #include "frc971/solvers/sparse_convex.h"
 
-#include <Eigen/Sparse>
-#include <Eigen/SparseLU>
-
 #include "absl/strings/str_join.h"
 #include "glog/logging.h"
+#include <Eigen/Sparse>
+#include <Eigen/SparseLU>
 
 namespace frc971 {
 namespace solvers {