code style fixes:

- reordered includes to prevent accidental dependencies.
- moved arch specific files into their own folder (easier to include with cmake).
- renamed non-class files to reflect new code style (lower case with underscores).
- using full relative paths for includes (easier for understanding dependencies).
- using #pragma once instead of classic-style header guards.

src/test/integtests/Main.cpp

@@ -16,16 +16,17 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <iostream>
-#include <fstream>
-#include <gtest/gtest.h>
-#include "CArch.h"
-#include "CLog.h"
+#include "arch/Arch.h"
+#include "base/Log.h"
 
 #if SYSAPI_WIN32
-#include "CArchMiscWindows.h"
+#include "arch/win32/ArchMiscWindows.h"
 #endif
 
+#include <gtest/gtest.h>
+#include <iostream>
+#include <fstream>
+
 #define LOCK_TIMEOUT 30
 
 using namespace std;