Problem::Evaluate implementation.

1. Add Problem::Evaluate and tests.
2. Remove Solver::Summary::initial/final_*
3. Remove Solver::Options::return_* members.
4. Various cpplint cleanups.

Change-Id: I4266de53489896f72d9c6798c5efde6748d68a47
diff --git a/internal/ceres/schur_eliminator_impl.h b/internal/ceres/schur_eliminator_impl.h
index 6120db9..339c44b 100644
--- a/internal/ceres/schur_eliminator_impl.h
+++ b/internal/ceres/schur_eliminator_impl.h
@@ -50,7 +50,6 @@
 
 #include <algorithm>
 #include <map>
-#include <glog/logging.h>
 #include "Eigen/Dense"
 #include "ceres/block_random_access_matrix.h"
 #include "ceres/block_sparse_matrix.h"
@@ -60,6 +59,7 @@
 #include "ceres/stl_util.h"
 #include "ceres/internal/eigen.h"
 #include "ceres/internal/scoped_ptr.h"
+#include "glog/logging.h"
 
 namespace ceres {
 namespace internal {