Merge pull request #64 from shrikant-dropbox/master

MSVS 2013 compatibility changes.

json11.hpp

@@ -56,6 +56,18 @@
 #include <memory>
 #include <initializer_list>
 
+#ifdef _MSC_VER
+    #if _MSC_VER <= 1800 // VS 2013
+        #ifndef noexcept
+            #define noexcept throw()
+        #endif
+
+        #ifndef snprintf
+            #define snprintf _snprintf_s
+        #endif
+    #endif
+#endif
+
 namespace json11 {
 
 enum JsonParse {