change throw() to noexcept to conform to c++11
diff --git a/include/json/value.h b/include/json/value.h
index fb88c18..f2eb3f3 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -53,8 +53,8 @@
 class JSON_API Exception : public std::exception {
 public:
   Exception(JSONCPP_STRING const& msg);
-  ~Exception() throw() JSONCPP_OVERRIDE;
-  char const* what() const throw() JSONCPP_OVERRIDE;
+  ~Exception() JSONCPP_NOEXCEPT JSONCPP_OVERRIDE;
+  char const* what() const JSONCPP_NOEXCEPT JSONCPP_OVERRIDE;
 protected:
   JSONCPP_STRING msg_;
 };