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_stream.hpp

@@ -27,7 +27,7 @@ namespace Catch {
             setp( data, data + sizeof(data) );
         }
 
-        ~StreamBufImpl() throw() {
+        ~StreamBufImpl() CATCH_NOEXCEPT {
             sync();
         }