Conditionally removes usage of deprecated features

-add macros to test for C++ version and features
to catch_compiler_capabilities.hpp
- replaces dynamic exception specifications (deprecated)
with noexcept in C++ Version >= 11
- defines defaulted copy constructor/move constructors/assignment
in C++ Version >= 11 since their implicit generation is deprecated
under some circumstances.
- fixes #259

include/internal/catch_streambuf.h

@@ -14,7 +14,7 @@ namespace Catch {
 
     class StreamBufBase : public std::streambuf {
     public:
-        virtual ~StreamBufBase() throw();
+        virtual ~StreamBufBase() CATCH_NOEXCEPT;
     };
 }