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

internal/ceres/graph_algorithms.h

diff --git a/internal/ceres/graph_algorithms.h b/internal/ceres/graph_algorithms.h
index 3b42d93..2e6eec0 100644
--- a/internal/ceres/graph_algorithms.h
+++ b/internal/ceres/graph_algorithms.h
@@ -33,10 +33,12 @@
 #ifndef CERES_INTERNAL_GRAPH_ALGORITHMS_H_
 #define CERES_INTERNAL_GRAPH_ALGORITHMS_H_
 
+#include <algorithm>
 #include <vector>
-#include <glog/logging.h>
+#include <utility>
 #include "ceres/collections_port.h"
 #include "ceres/graph.h"
+#include "glog/logging.h"
 
 namespace ceres {
 namespace internal {