First cut of Timer class.

- started integrating with reporters (now (optionally) supported in console reporter).
- introduced Node<> template to help with cumulative reporting and used it instead of ThreadedSectionInfo.

include/internal/catch_timer.hpp

@@ -0,0 +1,62 @@
+/*
+ *  Created by Phil on 05/08/2013.
+ *  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)
+ */
+
+#include "catch_timer.h"
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++11-long-long"
+#endif
+
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <sys/time.h>
+#endif
+
+namespace Catch {
+
+    namespace {
+#ifdef WIN32
+        uint64_t getCurrentTicks() {
+            static uint64_t hz=0, hzo=0;
+            if (!hz) {
+                QueryPerformanceFrequency((LARGE_INTEGER*)&hz);
+                QueryPerformanceCounter((LARGE_INTEGER*)&hzo);
+            }
+            uint64_t t;
+            QueryPerformanceCounter((LARGE_INTEGER*)&t);
+            return ((t-hzo)*1000000)/hz;
+        }
+#else
+        uint64_t getCurrentTicks() {
+            timeval t;
+            gettimeofday(&t,NULL);
+            return (uint64_t)t.tv_sec * 1000000ull + (uint64_t)t.tv_usec;
+        }
+#endif
+    }
+
+    void Timer::start() {
+        m_ticks = getCurrentTicks();
+    }
+    unsigned int Timer::getElapsedNanoseconds() const {
+        return (unsigned int)(getCurrentTicks() - m_ticks);
+    }
+    unsigned int Timer::getElapsedMilliseconds() const {
+        return (unsigned int)((getCurrentTicks() - m_ticks)/1000);
+    }
+    double Timer::getElapsedSeconds() const {
+        return (getCurrentTicks() - m_ticks)/1000000.0;
+    }
+
+} // namespace Catch
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif