Added nothrow command line option

Causes _THROWS family of macros to no evaluate expression

include/internal/catch_interfaces_config.h

@@ -0,0 +1,21 @@
+/*
+ *  Created by Phil on 05/06/2012.
+ *  Copyright 2012 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+#ifndef TWOBLUECUBES_CATCH_INTERFACES_CONFIG_H_INCLUDED
+#define TWOBLUECUBES_CATCH_INTERFACES_CONFIG_H_INCLUDED
+
+namespace Catch {
+
+    struct IConfig {
+    
+        virtual ~IConfig(){}
+        
+        virtual bool allowThrows() const = 0;
+    };
+}
+
+#endif // TWOBLUECUBES_CATCH_INTERFACES_CONFIG_H_INCLUDED