Gutted catch_compiler_capabilities

All C++11 toggles are now removed. What is left is either platform
specific (POSIX_SIGNALS, WINDOWS_SEH), or possibly still needed
(USE_COUNTER).

If current CLion is compatible with `__COUNTER__`, then we should also
force `__COUNTER__` usage.

Changed
* CATCH_AUTO_PTR    -> std::unique_ptr
* CATCH_OVERRIDE    -> override
* CATCH_NULL        -> nullptr
* CATCH_NOEXCEPT    -> noexcept
* CATCH_NOEXCEPT_IS -> noexcept

Removed
* CATCH_CONFIG_CPP11_UNIQUE_PTR
* CATCH_CONFIG_CPP11_SHUFFLE
* CATCH_CONFIG_CPP11_TYPE_TRAITS
* CATCH_CONFIG_CPP11_OVERRIDE
* CATCH_CONFIG_CPP11_LONG_LONG
* CATCH_CONFIG_CPP11_TUPLE
* CATCH_CONFIG_CPP11_IS_ENUM
* CATCH_CONFIG_CPP11_GENERATED_METHODS
* CATCH_CONFIG_CPP11_NOEXCEPT
* CATCH_CONFIG_CPP11_NULLPTR
* CATCH_CONFIG_VARIADIC_MACROS

include/internal/catch_capture.hpp

@@ -143,7 +143,6 @@
 
 
 ///////////////////////////////////////////////////////////////////////////////
-#ifdef CATCH_CONFIG_VARIADIC_MACROS
     #define INTERNAL_CATCH_MSG( macroName, messageType, resultDisposition, ... ) \
         do { \
             Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, "", resultDisposition ); \
@@ -151,15 +150,6 @@
             __catchResult.captureResult( messageType ); \
             INTERNAL_CATCH_REACT( __catchResult ) \
         } while( Catch::alwaysFalse() )
-#else
-    #define INTERNAL_CATCH_MSG( messageType, resultDisposition, macroName, log ) \
-        do { \
-            Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, "", resultDisposition ); \
-            __catchResult << log + ::Catch::StreamEndStop(); \
-            __catchResult.captureResult( messageType ); \
-            INTERNAL_CATCH_REACT( __catchResult ) \
-        } while( Catch::alwaysFalse() )
-#endif
 
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_INFO( macroName, log ) \