remove std_min and std_max, update minmax coding guidelines

[SVN r23162]

performance/time_safe_greta.cpp

@@ -14,7 +14,6 @@
 
 #include <cassert>
 #include <boost/timer.hpp>
-#include <boost/minmax.hpp>
 #include "regexpr2.h"
 
 namespace gs{
@@ -50,7 +49,7 @@ double time_match(const std::string& re, const std::string& text, bool icase)
          e.match(text, what);
       }
       run = tim.elapsed();
-      result = std_min(run, result);
+      result = (std::min)(run, result);
    }
    return result / iter;
 }
@@ -97,7 +96,7 @@ double time_find_all(const std::string& re, const std::string& text, bool icase)
          }
       }
       run = tim.elapsed();
-      result = std_min(run, result);
+      result = (std::min)(run, result);
    }
    return result / iter;
 }