Context methods are non-static - accessed via interface

This is a move towards allowing multiple contexts - with the concept of a (possibly thread local) "current" context

include/internal/catch_interfaces_exception.h

@@ -51,7 +51,7 @@ namespace Catch {
     public:
         template<typename T>
         ExceptionTranslatorRegistrar( std::string(*translateFunction)( T& ) ) {
-            Catch::Context::getExceptionTranslatorRegistry().registerTranslator
+            getCurrentContext().getExceptionTranslatorRegistry().registerTranslator
                 ( new ExceptionTranslator<T>( translateFunction ) );
         }
     };