data_fitting.cc should include gflags.

Also fix glog/gflag includes and sorting in examples.

Change-Id: Ie07563b99cbb9172c941bb8f5fb7decb95fbb5d1
diff --git a/examples/bundle_adjuster.cc b/examples/bundle_adjuster.cc
index 530bda3..cc8c6a2 100644
--- a/examples/bundle_adjuster.cc
+++ b/examples/bundle_adjuster.cc
@@ -58,12 +58,12 @@
 #include <string>
 #include <vector>
 
-#include <gflags/gflags.h>
-#include <glog/logging.h>
 #include "bal_problem.h"
-#include "snavely_reprojection_error.h"
 #include "ceres/ceres.h"
 #include "ceres/random.h"
+#include "gflags/gflags.h"
+#include "glog/logging.h"
+#include "snavely_reprojection_error.h"
 
 DEFINE_string(input, "", "Input File name");
 DEFINE_bool(use_quaternions, false, "If true, uses quaternions to represent "