Update inline todo/docs add missing header file

Author: Peter Thorson

websocketpp/common/cpp11.hpp

@@ -88,9 +88,11 @@
     #endif
 
     #ifndef __GNUC__
-        // GCC as of version 4.9 (latest) does not support std::put_time yet.
+        // GCC as of version 4.9 does not support std::put_time yet.
         // so ignore it
         #define _WEBSOCKETPP_PUTTIME_
+
+        // todo: std::put_time may be present in version 5+
     #endif
 #else
     // In the absence of a blanket define, try to use compiler versions or

websocketpp/sha1/sha1.hpp

@@ -36,6 +36,8 @@ under the same license as the original, which is listed below.
 #ifndef SHA1_DEFINED
 #define SHA1_DEFINED
 
+#include <cstddef>
+
 namespace websocketpp {
 namespace sha1 {