Tweaks to allow headers to be glued together.

Added Python script to generate single header.
Added new XCode project that runs self test against single header

include/internal/catch_default_main.hpp

@@ -0,0 +1,37 @@
+/*
+ *  catch_default_main.hpp
+ *  Catch
+ *
+ *  Created by Phil on 20/05/2011.
+ *  Copyright 2011 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_DEFAULT_MAIN_HPP_INCLUDED
+#define TWOBLUECUBES_CATCH_DEFAULT_MAIN_HPP_INCLUDED
+
+int main (int argc, char * const argv[])
+{
+#ifdef __OBJC__
+    
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+    
+    Catch::registerTestMethods();
+    
+    int result = Catch::Main( argc, (char* const*)argv );
+    
+    [pool drain];
+    return result;
+    
+#else
+    
+    return Catch::Main( argc, argv );
+    
+#endif
+}
+
+
+#endif // TWOBLUECUBES_CATCH_DEFAULT_MAIN_HPP_INCLUDED