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/lib/base/String.h

@@ -16,14 +16,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef CSTRING_H
-#define CSTRING_H
+#pragma once
 
-#include "common.h"
-#include "stdstring.h"
+#include "common/common.h"
+#include "common/stdstring.h"
 
 // use standard C++ string class for our string class
 typedef std::string CString;
-
-#endif
-