Refactored a lot of code from headers into impl headers only compiled into one TU

- also added noimpl option to single header script - which only generates the non impl code

include/internal/catch_section.h

@@ -0,0 +1,49 @@
+/*
+ *  Created by Phil on 03/12/2013.
+ *  Copyright 2013 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_SECTION_H_INCLUDED
+#define TWOBLUECUBES_CATCH_SECTION_H_INCLUDED
+
+#include "catch_section_info.h"
+#include "catch_totals.hpp"
+#include "catch_timer.h"
+
+#include <string>
+
+namespace Catch {
+
+    class Section {
+    public:
+        Section(    SourceLineInfo const& lineInfo,
+                    std::string const& name,
+                    std::string const& description = "" );
+        ~Section();
+
+        // This indicates whether the section should be executed or not
+        operator bool();
+
+    private:
+
+        SectionInfo m_info;
+
+        std::string m_name;
+        Counts m_assertions;
+        bool m_sectionIncluded;
+        Timer m_timer;
+    };
+
+} // end namespace Catch
+
+#ifdef CATCH_CONFIG_VARIADIC_MACROS
+    #define INTERNAL_CATCH_SECTION( ... ) \
+        if( Catch::Section INTERNAL_CATCH_UNIQUE_NAME( catch_internal_Section ) = Catch::Section( CATCH_INTERNAL_LINEINFO, __VA_ARGS__ ) )
+#else
+    #define INTERNAL_CATCH_SECTION( name, desc ) \
+        if( Catch::Section INTERNAL_CATCH_UNIQUE_NAME( catch_internal_Section ) = Catch::Section( CATCH_INTERNAL_LINEINFO, name, desc ) )
+#endif
+
+#endif // TWOBLUECUBES_CATCH_SECTION_H_INCLUDED